Question
Download Solution PDFIf 3, 9, and 27 are in proportion, what is the fourth proportional?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
3, 9, and 27 are in proportion. We need to find the fourth proportional.
Concept:
In a proportion, if a/b = c/d, then d is the fourth proportional.
Formula Used:
If a, b, c, and d are in proportion, then a/b = c/d.
⇒ d = (b × c) / a
Calculation:
We have,
⇒ a = 3, b = 9, c = 27
Using the formula,
⇒ d = (b × c) / a
⇒ d = (9 × 27) / 3
⇒ d = 243 / 3
⇒ d = 81
∴ The fourth proportional is 81.
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