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Finding the Fourth Proportional to 8,664.39, 12,987.07 and 3,397.82

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Solution

The fourth proportional to 8,664.39, 12,987.07 and 3,397.82 is: 5,092.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,664.39 : 12,987.07 = 3,397.82 : x
  2. Step 2: Convert to fraction form
    8,664.39/12,987.07 = 3,397.82/x
  3. Step 3: Cross multiply
    8,664.39x = 12,987.07 × 3,397.82
  4. Step 4: Simplify right side
    8,664.39x = 44,127,652.76
  5. Step 5: Solve for x
    x = 44,127,652.76/8,664.39
  6. Step 6: Final answer
    x = 5,092.99

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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.