Home / 20,753,138.80-31,129,708.20-8,809,202.80

Finding the Fourth Proportional to 20,753,138.80, 31,129,708.20 and 8,809,202.80

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Solution

The fourth proportional to 20,753,138.80, 31,129,708.20 and 8,809,202.80 is: 13,213,804.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753,138.80 : 31,129,708.20 = 8,809,202.80 : x
  2. Step 2: Convert to fraction form
    20,753,138.80/31,129,708.20 = 8,809,202.80/x
  3. Step 3: Cross multiply
    20,753,138.80x = 31,129,708.20 × 8,809,202.80
  4. Step 4: Simplify right side
    20,753,138.80x = 274,227,912,638,622.97
  5. Step 5: Solve for x
    x = 274,227,912,638,622.97/20,753,138.80
  6. Step 6: Final answer
    x = 13,213,804.20

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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.