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Finding the Fourth Proportional to 13,385.91, 18,481.22 and 8,608

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Solution

The fourth proportional to 13,385.91, 18,481.22 and 8,608 is: 11,884.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,385.91 : 18,481.22 = 8,608 : x
  2. Step 2: Convert to fraction form
    13,385.91/18,481.22 = 8,608/x
  3. Step 3: Cross multiply
    13,385.91x = 18,481.22 × 8,608
  4. Step 4: Simplify right side
    13,385.91x = 159,086,341.76
  5. Step 5: Solve for x
    x = 159,086,341.76/13,385.91
  6. Step 6: Final answer
    x = 11,884.61

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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.