Question

why can you use cross products to solve the proportion 18/5=x/100

Answer 1

18/5 = x/100
1800 = 5x
-----      -----
5            5
360 =   x

You can use proportion to solve your equation to figure out the x value so you have corresponding ratios 

Answer 2

Answer:

We can use cross products to solve proportion to get the value of x.

Step-by-step explanation:

The given proportion is:

$\frac{18}{5}=\frac{x}{100}$

On cross multiplying, we get

$x=\frac{18\times100}{5}$

$x=18{\times}20$

$x=360$

We can use the given proportion and by cross multiplying we can find the value of x that is 360.