Home / 20,778,086.40-31,167,129.60-6,405,559.80

Finding the Fourth Proportional to 20,778,086.40, 31,167,129.60 and 6,405,559.80

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Solution

The fourth proportional to 20,778,086.40, 31,167,129.60 and 6,405,559.80 is: 9,608,339.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778,086.40 : 31,167,129.60 = 6,405,559.80 : x
  2. Step 2: Convert to fraction form
    20,778,086.40/31,167,129.60 = 6,405,559.80/x
  3. Step 3: Cross multiply
    20,778,086.40x = 31,167,129.60 × 6,405,559.80
  4. Step 4: Simplify right side
    20,778,086.40x = 199,642,912,447,150.09
  5. Step 5: Solve for x
    x = 199,642,912,447,150.09/20,778,086.40
  6. Step 6: Final answer
    x = 9,608,339.70

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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.