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Finding the Fourth Proportional to 13,677.61, 18,874.96 and 7,711.20

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Solution

The fourth proportional to 13,677.61, 18,874.96 and 7,711.20 is: 10,641.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,677.61 : 18,874.96 = 7,711.20 : x
  2. Step 2: Convert to fraction form
    13,677.61/18,874.96 = 7,711.20/x
  3. Step 3: Cross multiply
    13,677.61x = 18,874.96 × 7,711.20
  4. Step 4: Simplify right side
    13,677.61x = 145,548,591.55
  5. Step 5: Solve for x
    x = 145,548,591.55/13,677.61
  6. Step 6: Final answer
    x = 10,641.38

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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.