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Finding the Fourth Proportional to 8,299.28, 12,449.04 and 2,143.28

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Solution

The fourth proportional to 8,299.28, 12,449.04 and 2,143.28 is: 3,214.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,299.28 : 12,449.04 = 2,143.28 : x
  2. Step 2: Convert to fraction form
    8,299.28/12,449.04 = 2,143.28/x
  3. Step 3: Cross multiply
    8,299.28x = 12,449.04 × 2,143.28
  4. Step 4: Simplify right side
    8,299.28x = 26,681,778.45
  5. Step 5: Solve for x
    x = 26,681,778.45/8,299.28
  6. Step 6: Final answer
    x = 3,214.95

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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.