y/4=15/20 how do I solve the proportion? please explain it to me. I have several to do
y/4=15/20
Cross multiply.
20y = 60
Solve for y.
y = 60/20 = 3
http://www.aaamath.com/rat-prop-crossx.htm
To solve the proportion y/4 = 15/20, we need to cross-multiply and then solve for the variable.
Step 1: Cross-multiply
Multiply the numerator of the first fraction by the denominator of the second fraction and vice versa.
(y * 20) = (4 * 15)
Step 2: Simplify
Perform the multiplication on both sides.
20y = 60
Step 3: Solve for y
To isolate the variable y, we divide both sides of the equation by the coefficient of y, which is 20.
(20y) / 20 = 60 / 20
y = 3
Therefore, the value of y that satisfies the given proportion is 3.
If you have several proportions to solve, follow the same steps for each proportion. Cross-multiply, simplify, and then solve for the variable.