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Finding the Fourth Proportional to 20,419,538.90, 28,608,612.10 and 20,419,538.90

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Solution

The fourth proportional to 20,419,538.90, 28,608,612.10 and 20,419,538.90 is: 28,608,612.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419,538.90 : 28,608,612.10 = 20,419,538.90 : x
  2. Step 2: Convert to fraction form
    20,419,538.90/28,608,612.10 = 20,419,538.90/x
  3. Step 3: Cross multiply
    20,419,538.90x = 28,608,612.10 × 20,419,538.90
  4. Step 4: Simplify right side
    20,419,538.90x = 584,174,667,650,960.62
  5. Step 5: Solve for x
    x = 584,174,667,650,960.62/20,419,538.90
  6. Step 6: Final answer
    x = 28,608,612.10

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.