Question

What is the answer to this proportion 4/12=y/9

Answer 1

Use the Means-Extremes Property (Cross Multiply)

4/12=y/9

12*y = 4*9

Solve for y @yalo

Answer 2

\[ 4+ 4+ 4 = 12\]
3 parts of 4 added up give you 12 so,
Therefor just a 4 is 1/3rd of 12
\[4/12 = 1/3 = y/9\]
What should y be to be 1/3rd of 9
Lets see can we break 9 into 3 parts and figure it out
\[ 3+ 3+ 3 = 9\]
so for y to be 1/3rd of 9 what should it be?