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Finding the Fourth Proportional to 9,375.76, 12,939.17 and 5,397.85

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Solution

The fourth proportional to 9,375.76, 12,939.17 and 5,397.85 is: 7,449.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,375.76 : 12,939.17 = 5,397.85 : x
  2. Step 2: Convert to fraction form
    9,375.76/12,939.17 = 5,397.85/x
  3. Step 3: Cross multiply
    9,375.76x = 12,939.17 × 5,397.85
  4. Step 4: Simplify right side
    9,375.76x = 69,843,698.78
  5. Step 5: Solve for x
    x = 69,843,698.78/9,375.76
  6. Step 6: Final answer
    x = 7,449.39

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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.