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Finding the Fourth Proportional to 20,801,751.20, 31,146,639.60 and 20,801,751.20

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Solution

The fourth proportional to 20,801,751.20, 31,146,639.60 and 20,801,751.20 is: 31,146,639.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801,751.20 : 31,146,639.60 = 20,801,751.20 : x
  2. Step 2: Convert to fraction form
    20,801,751.20/31,146,639.60 = 20,801,751.20/x
  3. Step 3: Cross multiply
    20,801,751.20x = 31,146,639.60 × 20,801,751.20
  4. Step 4: Simplify right side
    20,801,751.20x = 647,904,647,675,267.50
  5. Step 5: Solve for x
    x = 647,904,647,675,267.50/20,801,751.20
  6. Step 6: Final answer
    x = 31,146,639.60

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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.