Answer:
A : B scale factor is 6 : 1
Step-by-step explanation:
Writing both given ratios in least-to-greatest order and in lowest terms, we have ...
24 : 36 : 45 = 8 : 12 : 15 . . . triangle A
4 : 6 : 7.5 = 8 : 12 : 15 . . . . . triangle B
The ratios of side lengths are the same, so the triangles are similar. The sides of the larger one are 24/4 = 6 times the sides of the smaller one.
A : B scale factor is 6 : 1