SOLUTION: Please help me solve the following problem: Find the missing length in the similar triangles. 1 triangles has sides of 3,5,4 and the other is 15, 12, x. How do you come up

Question 182895: Please help me solve the following problem:
Find the missing length in the similar triangles.
1 triangles has sides of 3,5,4 and the other is 15, 12, x.
How do you come up with a formula for x and how do you solve it.
Thank you.
Answer by ckelly2012(1) (Show Source): You can put this solution on YOUR website!
x=9
you solve by using a scale factor of 1/3
15 to 5= 1/3
12 to 4= 1/3
9 to 3= 1/3
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