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Finding the Fourth Proportional to 18,470.62, 27,686.78 and 8,601.78

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Solution

The fourth proportional to 18,470.62, 27,686.78 and 8,601.78 is: 12,893.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,470.62 : 27,686.78 = 8,601.78 : x
  2. Step 2: Convert to fraction form
    18,470.62/27,686.78 = 8,601.78/x
  3. Step 3: Cross multiply
    18,470.62x = 27,686.78 × 8,601.78
  4. Step 4: Simplify right side
    18,470.62x = 238,155,590.47
  5. Step 5: Solve for x
    x = 238,155,590.47/18,470.62
  6. Step 6: Final answer
    x = 12,893.75

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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.