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Finding the Fourth Proportional to 38,348.60, 57,544.86 and 20,819.90

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Solution

The fourth proportional to 38,348.60, 57,544.86 and 20,819.90 is: 31,241.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,348.60 : 57,544.86 = 20,819.90 : x
  2. Step 2: Convert to fraction form
    38,348.60/57,544.86 = 20,819.90/x
  3. Step 3: Cross multiply
    38,348.60x = 57,544.86 × 20,819.90
  4. Step 4: Simplify right side
    38,348.60x = 1,198,078,230.71
  5. Step 5: Solve for x
    x = 1,198,078,230.71/38,348.60
  6. Step 6: Final answer
    x = 31,241.77

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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.