​Triangles ABC​ and DFG are similar.

Which proportion can be used to find the value of DG⎯⎯⎯⎯⎯⎯?

157=5DG

5DG=156

DG15=57

57=15DG
Two triangles A B C and D F G. A B is 5 inches. B C is 6 inches. A C is 7 inches. D F is 15 inches. F G is 18 inches. Angle B is congruent to angle F.