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Finding the Fourth Proportional to 20,691,740.45, 31,037,610.68 and 20,691,740.45

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Solution

The fourth proportional to 20,691,740.45, 31,037,610.68 and 20,691,740.45 is: 31,037,610.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691,740.45 : 31,037,610.68 = 20,691,740.45 : x
  2. Step 2: Convert to fraction form
    20,691,740.45/31,037,610.68 = 20,691,740.45/x
  3. Step 3: Cross multiply
    20,691,740.45x = 31,037,610.68 × 20,691,740.45
  4. Step 4: Simplify right side
    20,691,740.45x = 642,222,184,275,249.25
  5. Step 5: Solve for x
    x = 642,222,184,275,249.25/20,691,740.45
  6. Step 6: Final answer
    x = 31,037,610.68

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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.