Posted by **Christy** on Tuesday, September 15, 2009 at 1:17am.

Consider the following students’ methods of solving the

Proportion 8/5 = 20/x and determine whether the methods

were correct:

Richie: First I divided 20 by 8 and got 2 1/2 Then I

multiplied by 5 and got 12 ½ for my answer.

Martha: I think of it this way. Every time a person

takes 8 steps, another person takes 5 steps. So 16 steps

correspond to 10 steps, and 24 steps correspond to 15

steps. As 20 is halfway between 16 and 24, I reasoned

that the answer was halfway between 10 and 15. I got

12 ½ for the answer.

Explain your reasoning.

I feel that both methods were correct in determining the answer, they were both based on comparison, the first one cross multiplied where the second one used equivalent ratios ?

Is that correct ? am I wrong or missing something ?

## Answer This Question

## Related Questions

- math - Consider the following students method of solving the proportion 8/5 = 20...
- Pre-Algebra - I need to check my work... estimate the following products or ...
- Human Resource Management - Consider these methods for performance appraisal: ...
- math 116 - After solving a system of linear equations, how can you check your ...
- Technology - How can you find out which study method is best for you? A. Use ...
- business - Post your answer to Study Question 5.2 on p. 180 (Ch. 5). As you read...
- algebra - • After solving a system of linear equations, how can you check your ...
- Algebra - Can somebody please help me with solving this and show steps if they ...
- Math - 12) 2 1/7 x 3 2/3= 15/7x11/3=165/21=55/7=7 6/7 13)Divide. Write the ...
- English - Could you please tell me if everything is OK? Thank you. I had to ...

More Related Questions