Home / 21,002,558.80-31,503,838.20-18,770,506.60

Finding the Fourth Proportional to 21,002,558.80, 31,503,838.20 and 18,770,506.60

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Solution

The fourth proportional to 21,002,558.80, 31,503,838.20 and 18,770,506.60 is: 28,155,759.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002,558.80 : 31,503,838.20 = 18,770,506.60 : x
  2. Step 2: Convert to fraction form
    21,002,558.80/31,503,838.20 = 18,770,506.60/x
  3. Step 3: Cross multiply
    21,002,558.80x = 31,503,838.20 × 18,770,506.60
  4. Step 4: Simplify right side
    21,002,558.80x = 591,343,002,858,432.12
  5. Step 5: Solve for x
    x = 591,343,002,858,432.12/21,002,558.80
  6. Step 6: Final answer
    x = 28,155,759.90

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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.