Home / 20,801,740.40-31,160,620.20-11,815,794.80

Finding the Fourth Proportional to 20,801,740.40, 31,160,620.20 and 11,815,794.80

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Solution

The fourth proportional to 20,801,740.40, 31,160,620.20 and 11,815,794.80 is: 17,699,840.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801,740.40 : 31,160,620.20 = 11,815,794.80 : x
  2. Step 2: Convert to fraction form
    20,801,740.40/31,160,620.20 = 11,815,794.80/x
  3. Step 3: Cross multiply
    20,801,740.40x = 31,160,620.20 × 11,815,794.80
  4. Step 4: Simplify right side
    20,801,740.40x = 368,187,494,123,935
  5. Step 5: Solve for x
    x = 368,187,494,123,935/20,801,740.40
  6. Step 6: Final answer
    x = 17,699,840.83

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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.