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Finding the Fourth Proportional to 22,793.70, 31,408.65 and 16,815.90

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Solution

The fourth proportional to 22,793.70, 31,408.65 and 16,815.90 is: 23,171.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,793.70 : 31,408.65 = 16,815.90 : x
  2. Step 2: Convert to fraction form
    22,793.70/31,408.65 = 16,815.90/x
  3. Step 3: Cross multiply
    22,793.70x = 31,408.65 × 16,815.90
  4. Step 4: Simplify right side
    22,793.70x = 528,164,717.54
  5. Step 5: Solve for x
    x = 528,164,717.54/22,793.70
  6. Step 6: Final answer
    x = 23,171.52

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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.