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Finding the Fourth Proportional to 20,609,793.40, 28,815,919.40 and 20,609,793.40

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Solution

The fourth proportional to 20,609,793.40, 28,815,919.40 and 20,609,793.40 is: 28,815,919.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,609,793.40 : 28,815,919.40 = 20,609,793.40 : x
  2. Step 2: Convert to fraction form
    20,609,793.40/28,815,919.40 = 20,609,793.40/x
  3. Step 3: Cross multiply
    20,609,793.40x = 28,815,919.40 × 20,609,793.40
  4. Step 4: Simplify right side
    20,609,793.40x = 593,890,145,465,051.88
  5. Step 5: Solve for x
    x = 593,890,145,465,051.88/20,609,793.40
  6. Step 6: Final answer
    x = 28,815,919.40

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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.