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Finding the Fourth Proportional to 28,101.30, 42,151.95 and 14,979.30

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Solution

The fourth proportional to 28,101.30, 42,151.95 and 14,979.30 is: 22,468.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,101.30 : 42,151.95 = 14,979.30 : x
  2. Step 2: Convert to fraction form
    28,101.30/42,151.95 = 14,979.30/x
  3. Step 3: Cross multiply
    28,101.30x = 42,151.95 × 14,979.30
  4. Step 4: Simplify right side
    28,101.30x = 631,406,704.64
  5. Step 5: Solve for x
    x = 631,406,704.64/28,101.30
  6. Step 6: Final answer
    x = 22,468.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.