Home / 21,002,564.80-31,503,847.20-18,770,512.60

Finding the Fourth Proportional to 21,002,564.80, 31,503,847.20 and 18,770,512.60

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Solution

The fourth proportional to 21,002,564.80, 31,503,847.20 and 18,770,512.60 is: 28,155,768.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002,564.80 : 31,503,847.20 = 18,770,512.60 : x
  2. Step 2: Convert to fraction form
    21,002,564.80/31,503,847.20 = 18,770,512.60/x
  3. Step 3: Cross multiply
    21,002,564.80x = 31,503,847.20 × 18,770,512.60
  4. Step 4: Simplify right side
    21,002,564.80x = 591,343,360,816,074.75
  5. Step 5: Solve for x
    x = 591,343,360,816,074.75/21,002,564.80
  6. Step 6: Final answer
    x = 28,155,768.90

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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.