Question

PLEASE HELP, EASY QUESTION

All of the following proportions are equivalent except

a/b=c/d
b/a=d/c
a/d=c/b
a/c=b/d

Answer 1

I’m pretty sure it’s a/c=b/d. Bc don’t a=c and b=d?

Answer 2

All of the following proportions are equivalent except a/d=c/b.

a/b=c/d

b/a=d/c => a/b = c/d

a/d=c/b not equal to a/b = c/d

a/c=b/d => a/b = c/d

Explanation: