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Finding the Fourth Proportional to 20,630.61, 28,470.92 and 11,677.92

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Solution

The fourth proportional to 20,630.61, 28,470.92 and 11,677.92 is: 16,115.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.61 : 28,470.92 = 11,677.92 : x
  2. Step 2: Convert to fraction form
    20,630.61/28,470.92 = 11,677.92/x
  3. Step 3: Cross multiply
    20,630.61x = 28,470.92 × 11,677.92
  4. Step 4: Simplify right side
    20,630.61x = 332,481,126.09
  5. Step 5: Solve for x
    x = 332,481,126.09/20,630.61
  6. Step 6: Final answer
    x = 16,115.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.