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Finding the Fourth Proportional to 9,003.78, 12,433.80 and 8,512.92

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Solution

The fourth proportional to 9,003.78, 12,433.80 and 8,512.92 is: 11,755.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,003.78 : 12,433.80 = 8,512.92 : x
  2. Step 2: Convert to fraction form
    9,003.78/12,433.80 = 8,512.92/x
  3. Step 3: Cross multiply
    9,003.78x = 12,433.80 × 8,512.92
  4. Step 4: Simplify right side
    9,003.78x = 105,847,944.70
  5. Step 5: Solve for x
    x = 105,847,944.70/9,003.78
  6. Step 6: Final answer
    x = 11,755.95

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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.