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Finding the Fourth Proportional to 18,654.11, 27,962.47 and 8,665.88

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Solution

The fourth proportional to 18,654.11, 27,962.47 and 8,665.88 is: 12,990.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,654.11 : 27,962.47 = 8,665.88 : x
  2. Step 2: Convert to fraction form
    18,654.11/27,962.47 = 8,665.88/x
  3. Step 3: Cross multiply
    18,654.11x = 27,962.47 × 8,665.88
  4. Step 4: Simplify right side
    18,654.11x = 242,319,501.53
  5. Step 5: Solve for x
    x = 242,319,501.53/18,654.11
  6. Step 6: Final answer
    x = 12,990.14

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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.