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Finding the Fourth Proportional to 18,791.96, 28,192.70 and 5,644.44

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Solution

The fourth proportional to 18,791.96, 28,192.70 and 5,644.44 is: 8,468.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,791.96 : 28,192.70 = 5,644.44 : x
  2. Step 2: Convert to fraction form
    18,791.96/28,192.70 = 5,644.44/x
  3. Step 3: Cross multiply
    18,791.96x = 28,192.70 × 5,644.44
  4. Step 4: Simplify right side
    18,791.96x = 159,132,003.59
  5. Step 5: Solve for x
    x = 159,132,003.59/18,791.96
  6. Step 6: Final answer
    x = 8,468.09

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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.