# If y = 14 when x = 18, how do you find x when y = 316?

May 7, 2018

$x$ = ~406.29

#### Explanation:

y = 14 when x = 18; y = 316, what is x?

Create a proportion.

$\frac{y}{x}$ $\frac{14}{18}$ = $\frac{316}{x}$

Cross multiply.

$14 x = 5688$

Divide 5688 by 14 to isolate for x.

$\frac{5688}{14}$ = $x$

$x$ = 406.28571428571