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Finding the Fourth Proportional to 18,391.68, 27,590.27 and 8,531.96

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Solution

The fourth proportional to 18,391.68, 27,590.27 and 8,531.96 is: 12,799.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,391.68 : 27,590.27 = 8,531.96 : x
  2. Step 2: Convert to fraction form
    18,391.68/27,590.27 = 8,531.96/x
  3. Step 3: Cross multiply
    18,391.68x = 27,590.27 × 8,531.96
  4. Step 4: Simplify right side
    18,391.68x = 235,398,899.42
  5. Step 5: Solve for x
    x = 235,398,899.42/18,391.68
  6. Step 6: Final answer
    x = 12,799.21

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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.