y is to 20 as 9 is to 5

Question

i don't know the answer 

Answer 1

A proportion is two equal ratios.

 

"y is to 20 as 9 is to 5"

written as ratios, this is:

    y : 20  ::  9 : 5

 

written as fractions, this is:

    y/20 = 9/5

 

   y = 36        [multiply both sides by 20]

 

 36 is to 20 as 9 is to 5.