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Finding the Fourth Proportional to 57,426.70, 86,140.10 and 21,879.76

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Solution

The fourth proportional to 57,426.70, 86,140.10 and 21,879.76 is: 32,819.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,426.70 : 86,140.10 = 21,879.76 : x
  2. Step 2: Convert to fraction form
    57,426.70/86,140.10 = 21,879.76/x
  3. Step 3: Cross multiply
    57,426.70x = 86,140.10 × 21,879.76
  4. Step 4: Simplify right side
    57,426.70x = 1,884,724,714.38
  5. Step 5: Solve for x
    x = 1,884,724,714.38/57,426.70
  6. Step 6: Final answer
    x = 32,819.66

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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.