Home / 20,781,013.20-31,171,519.80-8,646,443.70

Finding the Fourth Proportional to 20,781,013.20, 31,171,519.80 and 8,646,443.70

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Solution

The fourth proportional to 20,781,013.20, 31,171,519.80 and 8,646,443.70 is: 12,969,665.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781,013.20 : 31,171,519.80 = 8,646,443.70 : x
  2. Step 2: Convert to fraction form
    20,781,013.20/31,171,519.80 = 8,646,443.70/x
  3. Step 3: Cross multiply
    20,781,013.20x = 31,171,519.80 × 8,646,443.70
  4. Step 4: Simplify right side
    20,781,013.20x = 269,522,790,994,135.25
  5. Step 5: Solve for x
    x = 269,522,790,994,135.25/20,781,013.20
  6. Step 6: Final answer
    x = 12,969,665.55

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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.