Respuesta :

We can use the proportion 6/2=15/x

6/2 simplifies to 3, so 15/x, x must make the fraction equal to 3 as well.

So x=5. This is because 15/5=3

The scale factor is 2 1/2 if you need that.

Hope this helps!
Your answer would be X=5 if u need the work shown let me know!