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Finding the Fourth Proportional to 18,682.65, 25,781.09 and 11,608.92

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Solution

The fourth proportional to 18,682.65, 25,781.09 and 11,608.92 is: 16,019.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,682.65 : 25,781.09 = 11,608.92 : x
  2. Step 2: Convert to fraction form
    18,682.65/25,781.09 = 11,608.92/x
  3. Step 3: Cross multiply
    18,682.65x = 25,781.09 × 11,608.92
  4. Step 4: Simplify right side
    18,682.65x = 299,290,553.28
  5. Step 5: Solve for x
    x = 299,290,553.28/18,682.65
  6. Step 6: Final answer
    x = 16,019.71

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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.