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Finding the Fourth Proportional to 21,673.76, 29,909.78 and 11,737.76

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Solution

The fourth proportional to 21,673.76, 29,909.78 and 11,737.76 is: 16,198.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,673.76 : 29,909.78 = 11,737.76 : x
  2. Step 2: Convert to fraction form
    21,673.76/29,909.78 = 11,737.76/x
  3. Step 3: Cross multiply
    21,673.76x = 29,909.78 × 11,737.76
  4. Step 4: Simplify right side
    21,673.76x = 351,073,819.29
  5. Step 5: Solve for x
    x = 351,073,819.29/21,673.76
  6. Step 6: Final answer
    x = 16,198.10

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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.