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Finding the Fourth Proportional to 11,203.60, 16,805.40 and 8,251.15

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Solution

The fourth proportional to 11,203.60, 16,805.40 and 8,251.15 is: 12,376.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,203.60 : 16,805.40 = 8,251.15 : x
  2. Step 2: Convert to fraction form
    11,203.60/16,805.40 = 8,251.15/x
  3. Step 3: Cross multiply
    11,203.60x = 16,805.40 × 8,251.15
  4. Step 4: Simplify right side
    11,203.60x = 138,663,876.21
  5. Step 5: Solve for x
    x = 138,663,876.21/11,203.60
  6. Step 6: Final answer
    x = 12,376.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.