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Finding the Fourth Proportional to 18,654.62, 27,963.23 and 8,666.38

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Solution

The fourth proportional to 18,654.62, 27,963.23 and 8,666.38 is: 12,990.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,654.62 : 27,963.23 = 8,666.38 : x
  2. Step 2: Convert to fraction form
    18,654.62/27,963.23 = 8,666.38/x
  3. Step 3: Cross multiply
    18,654.62x = 27,963.23 × 8,666.38
  4. Step 4: Simplify right side
    18,654.62x = 242,339,933.88
  5. Step 5: Solve for x
    x = 242,339,933.88/18,654.62
  6. Step 6: Final answer
    x = 12,990.88

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1.5x scale

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.