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Finding the Fourth Proportional to 11,616.78, 17,425.20 and 5,460.78

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Solution

The fourth proportional to 11,616.78, 17,425.20 and 5,460.78 is: 8,191.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,616.78 : 17,425.20 = 5,460.78 : x
  2. Step 2: Convert to fraction form
    11,616.78/17,425.20 = 5,460.78/x
  3. Step 3: Cross multiply
    11,616.78x = 17,425.20 × 5,460.78
  4. Step 4: Simplify right side
    11,616.78x = 95,155,183.66
  5. Step 5: Solve for x
    x = 95,155,183.66/11,616.78
  6. Step 6: Final answer
    x = 8,191.18

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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.