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Finding the Fourth Proportional to 18,463.87, 27,684.78 and 8,605.36

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Solution

The fourth proportional to 18,463.87, 27,684.78 and 8,605.36 is: 12,902.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,463.87 : 27,684.78 = 8,605.36 : x
  2. Step 2: Convert to fraction form
    18,463.87/27,684.78 = 8,605.36/x
  3. Step 3: Cross multiply
    18,463.87x = 27,684.78 × 8,605.36
  4. Step 4: Simplify right side
    18,463.87x = 238,237,498.42
  5. Step 5: Solve for x
    x = 238,237,498.42/18,463.87
  6. Step 6: Final answer
    x = 12,902.90

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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.