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Finding the Fourth Proportional to 18,666, 27,989.88 and 8,796.96

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Solution

The fourth proportional to 18,666, 27,989.88 and 8,796.96 is: 13,191.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,666 : 27,989.88 = 8,796.96 : x
  2. Step 2: Convert to fraction form
    18,666/27,989.88 = 8,796.96/x
  3. Step 3: Cross multiply
    18,666x = 27,989.88 × 8,796.96
  4. Step 4: Simplify right side
    18,666x = 246,225,854.76
  5. Step 5: Solve for x
    x = 246,225,854.76/18,666
  6. Step 6: Final answer
    x = 13,191.14

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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.