Find the scale factor of each if the polygons are proportional

A = 7, 7, 21, 23 B = 28.7, 28.7, 86.1, 94.3

I choose A and I am still kind of confused because I divided 7/28.7 and got 0.2439024 in the calculator but when I did it I got 4.1

A Prop, s.f. = 0.244

B Prop, s.f. = 0.215

C Prop, s.f. = 0.284

D Prop, s.f. = 0.297

E Prop, s.f. = 0.236

F Prop, s.f. = 0.212