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Finding the Fourth Proportional to 11,115.16, 16,691.84 and 9,868.56

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Solution

The fourth proportional to 11,115.16, 16,691.84 and 9,868.56 is: 14,819.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.16 : 16,691.84 = 9,868.56 : x
  2. Step 2: Convert to fraction form
    11,115.16/16,691.84 = 9,868.56/x
  3. Step 3: Cross multiply
    11,115.16x = 16,691.84 × 9,868.56
  4. Step 4: Simplify right side
    11,115.16x = 164,724,424.55
  5. Step 5: Solve for x
    x = 164,724,424.55/11,115.16
  6. Step 6: Final answer
    x = 14,819.80

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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.