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Finding the Fourth Proportional to 13,677.73, 18,865.87 and 8,375.15

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Solution

The fourth proportional to 13,677.73, 18,865.87 and 8,375.15 is: 11,551.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,677.73 : 18,865.87 = 8,375.15 : x
  2. Step 2: Convert to fraction form
    13,677.73/18,865.87 = 8,375.15/x
  3. Step 3: Cross multiply
    13,677.73x = 18,865.87 × 8,375.15
  4. Step 4: Simplify right side
    13,677.73x = 158,004,491.13
  5. Step 5: Solve for x
    x = 158,004,491.13/13,677.73
  6. Step 6: Final answer
    x = 11,551.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.