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4, *, 9, 13½ are in proportion. Then * is
  • a)
    6
  • b)
    8
  • c)
    9
  • d)
    none of these
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
4, *, 9, 13½ are in proportion. Then * isa)6b)8c)9d)none of these...
Given: 4, *, 9, 13 are in proportion.

To find: The value of *

We know that if four numbers a, b, c, and d are in proportion, then:

a : b = c : d

Using this property, we can write:

4 : * = 9 : 13

Cross-multiplying both sides, we get:

4 × 13 = 9 × *

52 = 9*

Dividing both sides by 9, we get:

* = 52/9

Simplifying further, we get:

* = 5.7778

Therefore, the value of * is 6 (approximate to one decimal place).

Hence, the correct option is (a) 6.
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Community Answer
4, *, 9, 13½ are in proportion. Then * isa)6b)8c)9d)none of these...
Yes because 4:x::9:13.5 therefore product of mean=product of extreme so it will be 6
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4, *, 9, 13½ are in proportion. Then * isa)6b)8c)9d)none of theseCorrect answer is option 'A'. Can you explain this answer?
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