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Finding the Fourth Proportional to 8,489.64, 12,721.14 and 3,292.68

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Solution

The fourth proportional to 8,489.64, 12,721.14 and 3,292.68 is: 4,933.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,489.64 : 12,721.14 = 3,292.68 : x
  2. Step 2: Convert to fraction form
    8,489.64/12,721.14 = 3,292.68/x
  3. Step 3: Cross multiply
    8,489.64x = 12,721.14 × 3,292.68
  4. Step 4: Simplify right side
    8,489.64x = 41,886,643.26
  5. Step 5: Solve for x
    x = 41,886,643.26/8,489.64
  6. Step 6: Final answer
    x = 4,933.85

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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.