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Finding the Fourth Proportional to 20,561.22, 28,373.22 and 11,609.10

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Solution

The fourth proportional to 20,561.22, 28,373.22 and 11,609.10 is: 16,019.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.22 : 28,373.22 = 11,609.10 : x
  2. Step 2: Convert to fraction form
    20,561.22/28,373.22 = 11,609.10/x
  3. Step 3: Cross multiply
    20,561.22x = 28,373.22 × 11,609.10
  4. Step 4: Simplify right side
    20,561.22x = 329,387,548.30
  5. Step 5: Solve for x
    x = 329,387,548.30/20,561.22
  6. Step 6: Final answer
    x = 16,019.84

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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.