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Finding the Fourth Proportional to 15,039.92, 20,755.34 and 8,234.54

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Solution

The fourth proportional to 15,039.92, 20,755.34 and 8,234.54 is: 11,363.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,039.92 : 20,755.34 = 8,234.54 : x
  2. Step 2: Convert to fraction form
    15,039.92/20,755.34 = 8,234.54/x
  3. Step 3: Cross multiply
    15,039.92x = 20,755.34 × 8,234.54
  4. Step 4: Simplify right side
    15,039.92x = 170,910,617.57
  5. Step 5: Solve for x
    x = 170,910,617.57/15,039.92
  6. Step 6: Final answer
    x = 11,363.80

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1.5x scale

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.