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Finding the Fourth Proportional to 18,691.14, 27,996.50 and 8,815.62

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Solution

The fourth proportional to 18,691.14, 27,996.50 and 8,815.62 is: 13,204.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,691.14 : 27,996.50 = 8,815.62 : x
  2. Step 2: Convert to fraction form
    18,691.14/27,996.50 = 8,815.62/x
  3. Step 3: Cross multiply
    18,691.14x = 27,996.50 × 8,815.62
  4. Step 4: Simplify right side
    18,691.14x = 246,806,505.33
  5. Step 5: Solve for x
    x = 246,806,505.33/18,691.14
  6. Step 6: Final answer
    x = 13,204.47

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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.