How could you use cross products to check the solution to this proportion? 12

30

=

5

x

30(5) = (12)(x)

150 = 12x

12.5 = x

The value of x is 12.5.

Step-by-step explanation:

We are given with the following proportion below;

To find the value of , first we have to find the number by which 12 must be divided so that we get 5 as a result.

That number is 2.4, that is if we divide 12 with 2.4 we get the result as 5.

So,    

This means that

                           .

So, we get the value of x = 12.5.

Now, to check the solution to this proportion, we use cross multiplication method;

150  =  150

Since both sides of the equation are equal, that means our value of x = 12.5 is correct.

the weight of the object inside the box!