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Finding the Fourth Proportional to 38,752.70, 58,133.92 and 12,456.86

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Solution

The fourth proportional to 38,752.70, 58,133.92 and 12,456.86 is: 18,686.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,752.70 : 58,133.92 = 12,456.86 : x
  2. Step 2: Convert to fraction form
    38,752.70/58,133.92 = 12,456.86/x
  3. Step 3: Cross multiply
    38,752.70x = 58,133.92 × 12,456.86
  4. Step 4: Simplify right side
    38,752.70x = 724,166,102.69
  5. Step 5: Solve for x
    x = 724,166,102.69/38,752.70
  6. Step 6: Final answer
    x = 18,686.86

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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.