Question

Solve for x.

12:15 = x:5

Answer 1

Please help me

Answer 2

To be honest, I don't know if there's like a more orthodox way to do this, but this will work too: try to get these ratios to the same greatest common factor.

Answer 3

In this case, you would divide the first ratio by 3 so that it's the same with the ratio on the other side.

Answer 4

__:__ = __:__ can also b written as fractions
\[\frac{12}{15}=\frac{x}{5}\] cross multiply
\[12(5) = 15(x)\\60=15x\]
then divide 60 by 15