30
The third proportional of two numbers 4 and 28 is _______.
- A52
- B56
- C84
- D196
Answer not set
Discussion 1
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CCommunity
The third proportional of two numbers a and b is defined to be that number c such that a : b = b : c.
Let c be the third proportion of 4 and 28
4 : 28 = 28 : c
c = (28 × 28)/4 = 196
Let c be the third proportion of 4 and 28
4 : 28 = 28 : c
c = (28 × 28)/4 = 196