Question

are 2.1, 3.5, 13.5 and 22.5 in proportion?

Answer 1

middle terms= 3.5 and 13.5
extreme terms= 2.1 and 22.5
sum of middle terms= 3.5+13.5= 17
sum of extreme terms= 2.1+22.5= 24.6
so, they are not in proportion as the sum of middle and extreme terms is not equal

Answer 2

Answer:

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