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Finding the Fourth Proportional to 42,391.72, 63,599.10 and 14,691.88

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Solution

The fourth proportional to 42,391.72, 63,599.10 and 14,691.88 is: 22,041.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,391.72 : 63,599.10 = 14,691.88 : x
  2. Step 2: Convert to fraction form
    42,391.72/63,599.10 = 14,691.88/x
  3. Step 3: Cross multiply
    42,391.72x = 63,599.10 × 14,691.88
  4. Step 4: Simplify right side
    42,391.72x = 934,390,345.31
  5. Step 5: Solve for x
    x = 934,390,345.31/42,391.72
  6. Step 6: Final answer
    x = 22,041.81

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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.