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Finding the Fourth Proportional to 20,795,847.90, 31,193,771.85 and 20,795,847.90

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Solution

The fourth proportional to 20,795,847.90, 31,193,771.85 and 20,795,847.90 is: 31,193,771.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,795,847.90 : 31,193,771.85 = 20,795,847.90 : x
  2. Step 2: Convert to fraction form
    20,795,847.90/31,193,771.85 = 20,795,847.90/x
  3. Step 3: Cross multiply
    20,795,847.90x = 31,193,771.85 × 20,795,847.90
  4. Step 4: Simplify right side
    20,795,847.90x = 648,700,934,819,901.62
  5. Step 5: Solve for x
    x = 648,700,934,819,901.62/20,795,847.90
  6. Step 6: Final answer
    x = 31,193,771.85

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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.