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Finding the Fourth Proportional to 18,394.53, 27,565.88 and 8,000.61

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Solution

The fourth proportional to 18,394.53, 27,565.88 and 8,000.61 is: 11,989.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,394.53 : 27,565.88 = 8,000.61 : x
  2. Step 2: Convert to fraction form
    18,394.53/27,565.88 = 8,000.61/x
  3. Step 3: Cross multiply
    18,394.53x = 27,565.88 × 8,000.61
  4. Step 4: Simplify right side
    18,394.53x = 220,543,815.18
  5. Step 5: Solve for x
    x = 220,543,815.18/18,394.53
  6. Step 6: Final answer
    x = 11,989.64

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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.