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Finding the Fourth Proportional to 12,691, 17,521.26 and 8,282.68

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Solution

The fourth proportional to 12,691, 17,521.26 and 8,282.68 is: 11,435.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,691 : 17,521.26 = 8,282.68 : x
  2. Step 2: Convert to fraction form
    12,691/17,521.26 = 8,282.68/x
  3. Step 3: Cross multiply
    12,691x = 17,521.26 × 8,282.68
  4. Step 4: Simplify right side
    12,691x = 145,122,989.78
  5. Step 5: Solve for x
    x = 145,122,989.78/12,691
  6. Step 6: Final answer
    x = 11,435.11

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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.