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Finding the Fourth Proportional to 38,691, 58,033.44 and 12,388.68

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Solution

The fourth proportional to 38,691, 58,033.44 and 12,388.68 is: 18,582.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,691 : 58,033.44 = 12,388.68 : x
  2. Step 2: Convert to fraction form
    38,691/58,033.44 = 12,388.68/x
  3. Step 3: Cross multiply
    38,691x = 58,033.44 × 12,388.68
  4. Step 4: Simplify right side
    38,691x = 718,957,717.46
  5. Step 5: Solve for x
    x = 718,957,717.46/38,691
  6. Step 6: Final answer
    x = 18,582.04

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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.