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Finding the Fourth Proportional to 8,761.12, 13,138.52 and 4,375.58

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Solution

The fourth proportional to 8,761.12, 13,138.52 and 4,375.58 is: 6,561.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,761.12 : 13,138.52 = 4,375.58 : x
  2. Step 2: Convert to fraction form
    8,761.12/13,138.52 = 4,375.58/x
  3. Step 3: Cross multiply
    8,761.12x = 13,138.52 × 4,375.58
  4. Step 4: Simplify right side
    8,761.12x = 57,488,645.34
  5. Step 5: Solve for x
    x = 57,488,645.34/8,761.12
  6. Step 6: Final answer
    x = 6,561.79

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1.5x scale

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.