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Finding the Fourth Proportional to 10,468.20, 15,700.65 and 8,700.61

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Solution

The fourth proportional to 10,468.20, 15,700.65 and 8,700.61 is: 13,049.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,468.20 : 15,700.65 = 8,700.61 : x
  2. Step 2: Convert to fraction form
    10,468.20/15,700.65 = 8,700.61/x
  3. Step 3: Cross multiply
    10,468.20x = 15,700.65 × 8,700.61
  4. Step 4: Simplify right side
    10,468.20x = 136,605,193.14
  5. Step 5: Solve for x
    x = 136,605,193.14/10,468.20
  6. Step 6: Final answer
    x = 13,049.54

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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.