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Finding the Fourth Proportional to 9,375.90, 12,939.03 and 5,397.81

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Solution

The fourth proportional to 9,375.90, 12,939.03 and 5,397.81 is: 7,449.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,375.90 : 12,939.03 = 5,397.81 : x
  2. Step 2: Convert to fraction form
    9,375.90/12,939.03 = 5,397.81/x
  3. Step 3: Cross multiply
    9,375.90x = 12,939.03 × 5,397.81
  4. Step 4: Simplify right side
    9,375.90x = 69,842,425.52
  5. Step 5: Solve for x
    x = 69,842,425.52/9,375.90
  6. Step 6: Final answer
    x = 7,449.14

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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.