Question

if a b c d are in proportion then
A)a:b=c:d
B) b:a=d:c
C)ac:dc
D) botha, b​

Answer 1

Step-by-step explanation:

a:b=c:d

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Answer 2

a : b : : c : d

Product of means= product of extremes

ad = bc

a/b = c/d

a : b = c : d

b : a = d : c

Hence option (D) is correct.