Home / 20,780,999.20-31,171,498.80-8,646,429.70

Finding the Fourth Proportional to 20,780,999.20, 31,171,498.80 and 8,646,429.70

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Solution

The fourth proportional to 20,780,999.20, 31,171,498.80 and 8,646,429.70 is: 12,969,644.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780,999.20 : 31,171,498.80 = 8,646,429.70 : x
  2. Step 2: Convert to fraction form
    20,780,999.20/31,171,498.80 = 8,646,429.70/x
  3. Step 3: Cross multiply
    20,780,999.20x = 31,171,498.80 × 8,646,429.70
  4. Step 4: Simplify right side
    20,780,999.20x = 269,522,173,017,834.34
  5. Step 5: Solve for x
    x = 269,522,173,017,834.34/20,780,999.20
  6. Step 6: Final answer
    x = 12,969,644.55

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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.