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Finding the Fourth Proportional to 18,470.55, 27,715.11 and 8,610.60

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Solution

The fourth proportional to 18,470.55, 27,715.11 and 8,610.60 is: 12,920.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,470.55 : 27,715.11 = 8,610.60 : x
  2. Step 2: Convert to fraction form
    18,470.55/27,715.11 = 8,610.60/x
  3. Step 3: Cross multiply
    18,470.55x = 27,715.11 × 8,610.60
  4. Step 4: Simplify right side
    18,470.55x = 238,643,726.17
  5. Step 5: Solve for x
    x = 238,643,726.17/18,470.55
  6. Step 6: Final answer
    x = 12,920.23

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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.