math proportion

Question

6 over 15 =10 over x what is x

Answer 1

Hi Christina,

If I'm following you correctly we have the proportion 6/15 = 10/x and we want to find x.

The first step that I would do is to simplify 6/15 into it's simplest form. You can divide out 3 from both 6 and 15 and you're left with the fraction 2/5. So our new proportion is 2/5 = 10/x.

The next step is to cross multiply. This means that you multiply 2 and x and multiply 5 and 10.

You are now left with the equation 2x = 50. To find x, you have to divide both sides by 2. That will leave you with the equation x = 50/2.

Once you solve that out. you get that x = 25.

I hope that this is helpful!

Answer 2

6 = 10

15 x

To solve for x:

*Cross-multiply all numbers and variables diagonally from one another in the given fractions/equation:

15 x 10 = 150

6 times x = 6x

6x = 150

Divide both sides of the equation by 6 since it is connected to/multiplied by the variable x

6x = 150

6 6

150/6 = 25

x=25