Home / 21,002,572.80-31,503,859.20-18,770,520.60

Finding the Fourth Proportional to 21,002,572.80, 31,503,859.20 and 18,770,520.60

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Solution

The fourth proportional to 21,002,572.80, 31,503,859.20 and 18,770,520.60 is: 28,155,780.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002,572.80 : 31,503,859.20 = 18,770,520.60 : x
  2. Step 2: Convert to fraction form
    21,002,572.80/31,503,859.20 = 18,770,520.60/x
  3. Step 3: Cross multiply
    21,002,572.80x = 31,503,859.20 × 18,770,520.60
  4. Step 4: Simplify right side
    21,002,572.80x = 591,343,838,093,099.50
  5. Step 5: Solve for x
    x = 591,343,838,093,099.50/21,002,572.80
  6. Step 6: Final answer
    x = 28,155,780.90

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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.