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Finding the Fourth Proportional to 8,754.11, 12,078.50 and 5,169.15

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Solution

The fourth proportional to 8,754.11, 12,078.50 and 5,169.15 is: 7,132.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,754.11 : 12,078.50 = 5,169.15 : x
  2. Step 2: Convert to fraction form
    8,754.11/12,078.50 = 5,169.15/x
  3. Step 3: Cross multiply
    8,754.11x = 12,078.50 × 5,169.15
  4. Step 4: Simplify right side
    8,754.11x = 62,435,517.88
  5. Step 5: Solve for x
    x = 62,435,517.88/8,754.11
  6. Step 6: Final answer
    x = 7,132.14

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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.