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Finding the Fourth Proportional to 8,861, 12,228.18 and 5,549

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Solution

The fourth proportional to 8,861, 12,228.18 and 5,549 is: 7,657.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,861 : 12,228.18 = 5,549 : x
  2. Step 2: Convert to fraction form
    8,861/12,228.18 = 5,549/x
  3. Step 3: Cross multiply
    8,861x = 12,228.18 × 5,549
  4. Step 4: Simplify right side
    8,861x = 67,854,170.82
  5. Step 5: Solve for x
    x = 67,854,170.82/8,861
  6. Step 6: Final answer
    x = 7,657.62

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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.