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Finding the Fourth Proportional to 7,251.35, 10,881.21 and 3,919.61

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Solution

The fourth proportional to 7,251.35, 10,881.21 and 3,919.61 is: 5,881.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,251.35 : 10,881.21 = 3,919.61 : x
  2. Step 2: Convert to fraction form
    7,251.35/10,881.21 = 3,919.61/x
  3. Step 3: Cross multiply
    7,251.35x = 10,881.21 × 3,919.61
  4. Step 4: Simplify right side
    7,251.35x = 42,650,099.53
  5. Step 5: Solve for x
    x = 42,650,099.53/7,251.35
  6. Step 6: Final answer
    x = 5,881.68

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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.