Home / 20,900,905.92-28,841,657.76-11,731,777.20

Finding the Fourth Proportional to 20,900,905.92, 28,841,657.76 and 11,731,777.20

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Solution

The fourth proportional to 20,900,905.92, 28,841,657.76 and 11,731,777.20 is: 16,188,958.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900,905.92 : 28,841,657.76 = 11,731,777.20 : x
  2. Step 2: Convert to fraction form
    20,900,905.92/28,841,657.76 = 11,731,777.20/x
  3. Step 3: Cross multiply
    20,900,905.92x = 28,841,657.76 × 11,731,777.20
  4. Step 4: Simplify right side
    20,900,905.92x = 338,363,902,918,971.06
  5. Step 5: Solve for x
    x = 338,363,902,918,971.06/20,900,905.92
  6. Step 6: Final answer
    x = 16,188,958.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.