Question

A waffle recipe uses 3 cups for 4 waffles. How much mix would you need to make 12 waffles

Answer 1

Remark
Set up a proportion for this problem. Solve the proportion. 

Givens
3 cups make 4 waffles.

Solve
How many cups does it take to make 12 waffles.

Proportion
3 cups:4 waffles :: x: 12 waffles.

Solve
3/4 = x / 12     Cross multiply
3*12 = 4*x      Multiply the factors on the left.
36 = 4x           Divide by 4
36/4 = x
9   = x

Answer
9 cups of flour are needed for 12 waffles <<<< Answer 
 

Answer 2

You would need 9 cups