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Finding the Fourth Proportional to 20,882.96, 28,818.40 and 11,452.12

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Solution

The fourth proportional to 20,882.96, 28,818.40 and 11,452.12 is: 15,803.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,882.96 : 28,818.40 = 11,452.12 : x
  2. Step 2: Convert to fraction form
    20,882.96/28,818.40 = 11,452.12/x
  3. Step 3: Cross multiply
    20,882.96x = 28,818.40 × 11,452.12
  4. Step 4: Simplify right side
    20,882.96x = 330,031,775.01
  5. Step 5: Solve for x
    x = 330,031,775.01/20,882.96
  6. Step 6: Final answer
    x = 15,803.88

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.