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Finding the Fourth Proportional to 20,493.14, 30,747.04 and 8,649.86

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Solution

The fourth proportional to 20,493.14, 30,747.04 and 8,649.86 is: 12,977.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,493.14 : 30,747.04 = 8,649.86 : x
  2. Step 2: Convert to fraction form
    20,493.14/30,747.04 = 8,649.86/x
  3. Step 3: Cross multiply
    20,493.14x = 30,747.04 × 8,649.86
  4. Step 4: Simplify right side
    20,493.14x = 265,957,591.41
  5. Step 5: Solve for x
    x = 265,957,591.41/20,493.14
  6. Step 6: Final answer
    x = 12,977.88

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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.