What is the third proportional to 9 and 15?
  • a)
    30
  • b)
    27
  • c)
    36
  • d)
    25
Correct answer is option 'D'. Can you explain this answer?
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SSC Question

By SOURAV KUMAR · 4 weeks ago ·SSC
2 Answers
Knowledge Hub answered 4 weeks ago
Third proportional means number c in a : b = b : c
⇒ Third proportional to 9 and 15 is 9 : 15 = 15 : c
⇒ c = 25
∴ Third proportional to 9 and 15 = 25

Allam Anil answered 4 weeks ago
Bsquare=AC
A=9
B=15
15*15=9*C
25=C

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