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Finding the Fourth Proportional to 55,951.92, 83,928.18 and 20,891.28

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Solution

The fourth proportional to 55,951.92, 83,928.18 and 20,891.28 is: 31,337.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,951.92 : 83,928.18 = 20,891.28 : x
  2. Step 2: Convert to fraction form
    55,951.92/83,928.18 = 20,891.28/x
  3. Step 3: Cross multiply
    55,951.92x = 83,928.18 × 20,891.28
  4. Step 4: Simplify right side
    55,951.92x = 1,753,367,108.27
  5. Step 5: Solve for x
    x = 1,753,367,108.27/55,951.92
  6. Step 6: Final answer
    x = 31,337.03

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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.