Find a fourth proportional to the numbers 21, 35, 51.
Answer & explanation
Correct answer: option 3
Fourth Proportional of a,b and c = \(\frac{b\;×\;c}{a}\)
Fourth Proportional of 21,35 and 51 = \(\frac{35\;×\;51}{21}\) = 85
Find a fourth proportional to the numbers 21, 35, 51.
Correct answer: option 3
Fourth Proportional of a,b and c = \(\frac{b\;×\;c}{a}\)
Fourth Proportional of 21,35 and 51 = \(\frac{35\;×\;51}{21}\) = 85