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Finding the Fourth Proportional to 18,300.95, 27,456 and 8,447.12

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Solution

The fourth proportional to 18,300.95, 27,456 and 8,447.12 is: 12,672.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,300.95 : 27,456 = 8,447.12 : x
  2. Step 2: Convert to fraction form
    18,300.95/27,456 = 8,447.12/x
  3. Step 3: Cross multiply
    18,300.95x = 27,456 × 8,447.12
  4. Step 4: Simplify right side
    18,300.95x = 231,924,126.72
  5. Step 5: Solve for x
    x = 231,924,126.72/18,300.95
  6. Step 6: Final answer
    x = 12,672.79

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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.