Question

Find the missing number in this proportion.

7 2
=
4

Answer 1

x = 14

Explanation:

I don't know which one you are supposed to solve it by so I will do both.

Solution by Cross Multiplication

For the equation

7x=24

The cross product is

7×4=x×2

Solving for x

x=7×42

and reducing

x=14

Solution by Proportion

Since the equation is an equality

If

7 ÷ 2 = 3.5

Then it is true that

x ÷ 4 = 3.5

Solving for x

x = 4 × 3.5

x = 14

Answer 2

7/x = 2/4

2x = 28 (7×4=28)

× = 14 (28÷2=14)

So your answer is 14