# math156-proportions

posted by .

I can solve the proportions by any method. can anyone help me understand this.
#1
4/15 = x/5

#2
x/3 = x+10/6

• math156-proportions -

cross multiply.

So for #1 It becomes
(4)(5) = 15x in the next step.
then continue to find X

• math156-proportions -

What do you mean by "understand"?
I can solve the first one for you.
4/15 = x/5
Cross mutliply.
5*4 = x*15
20=15x
x=20/15 = 4/3 = 1.333.

The second one needs some work.Is that x/3 = x+(10/6) or is it
x/3 = (x+10)/6

• math156-proportions -

it is:

x/3 = x + 10/6

it would read as x over 3 = x plus 10 over 6

• math156-proportions -

what i meant by not understanding is just that, i am lost with the numbers and letters together once i get someone to show me one i can do the rest. I can whip threw them if they are story problems but not just a line of letters and numbers.

## Similar Questions

1. ### Ratios and proportions

RATIOS AND PROPORTIONS x 3 - = - 4 2 The boards don't post spacing as we would wish. I suppose the problem is x/4 = 3/2. Multiply left and right sides by 4. That will "cancel" the 4 in the denominator of the left side. Now multiply …
2. ### Algebra

I need help with proportions. Can someone explain to methis whole mn=pq thing or x/3=4/6 I don't understand how to di it. Please help! :) m is to n as p is to q. m/n=p/q you can solve for any of the four in terms of the others: m= …
3. ### statistics

For three independent samples, each with n= 100, the respective sample proportions are 0.30, 0.35, and 0.25. Use the 0.05 level in testing whether the three population proportions could be the same.
4. ### 8th grade Algebra I (junior level math)

Hello, I am currently in Unit 4-1 (Ratio, and Proportions) and I don't understand how pairs of ratios could form proportions. Could someone give me step by step instructions?
5. ### Math

I'm doing proportions, and I'm kinda confused with this one problem.. x/3=1/5. the way I do proportions is by cross multiplying, so I get 3=5x?
6. ### Math--Proportions

Solve for x: 2 to x+1=x+2 to 3 or 2 to x+3= x+2 to x+5 (the proportions end up being the same in the end) I keep getting to the part after you FOIL, and then I get stuck
7. ### AP Statistics

12) Which of the following statements is true?
8. ### Chemistry

What data led to the development of the Law of Multiple Proportions?
9. ### stats

The purpose of using stratified random sampling is to guarantee that the ______________. a. proportions within the samples represent the proportions in the population. b. sampling variability is increased c. sample groups are highly …
10. ### stats

scores on a University exam are normally distributed with a mean of 68 and a standard deviation of 9. use the 68-95-99.7 rule to answer the following questions 1) what proportions of students score between a 59 to 77?

More Similar Questions