3 : 8 = 12 : 32

N = 12

Solution by Cross Multiplication:

◼ Rewrite the equation as fractions.

◼ The cross product is

◼ Solve for n

Solution by Proportion

◼ Since the equation is an equality, if 32 ÷ 8 = 4, then it is true that n ÷ 3 = 4.

◼ Solving for n

n = 3 × 4

n = 12