Home / 20,780,999.20-31,172,211.60-6,403,952.80

Finding the Fourth Proportional to 20,780,999.20, 31,172,211.60 and 6,403,952.80

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Solution

The fourth proportional to 20,780,999.20, 31,172,211.60 and 6,403,952.80 is: 9,606,148.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780,999.20 : 31,172,211.60 = 6,403,952.80 : x
  2. Step 2: Convert to fraction form
    20,780,999.20/31,172,211.60 = 6,403,952.80/x
  3. Step 3: Cross multiply
    20,780,999.20x = 31,172,211.60 × 6,403,952.80
  4. Step 4: Simplify right side
    20,780,999.20x = 199,625,371,758,012.47
  5. Step 5: Solve for x
    x = 199,625,371,758,012.47/20,780,999.20
  6. Step 6: Final answer
    x = 9,606,148.86

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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.