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Finding the Fourth Proportional to 12,486.56, 17,229.20 and 8,068

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Solution

The fourth proportional to 12,486.56, 17,229.20 and 8,068 is: 11,132.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,486.56 : 17,229.20 = 8,068 : x
  2. Step 2: Convert to fraction form
    12,486.56/17,229.20 = 8,068/x
  3. Step 3: Cross multiply
    12,486.56x = 17,229.20 × 8,068
  4. Step 4: Simplify right side
    12,486.56x = 139,005,185.60
  5. Step 5: Solve for x
    x = 139,005,185.60/12,486.56
  6. Step 6: Final answer
    x = 11,132.38

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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.