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Finding the Fourth Proportional to 20,737.42, 28,617.42 and 11,305.78

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Solution

The fourth proportional to 20,737.42, 28,617.42 and 11,305.78 is: 15,601.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,737.42 : 28,617.42 = 11,305.78 : x
  2. Step 2: Convert to fraction form
    20,737.42/28,617.42 = 11,305.78/x
  3. Step 3: Cross multiply
    20,737.42x = 28,617.42 × 11,305.78
  4. Step 4: Simplify right side
    20,737.42x = 323,542,254.69
  5. Step 5: Solve for x
    x = 323,542,254.69/20,737.42
  6. Step 6: Final answer
    x = 15,601.86

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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.