Home / 21,205,463.20-31,770,716.40-20,503,818.40

Finding the Fourth Proportional to 21,205,463.20, 31,770,716.40 and 20,503,818.40

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Solution

The fourth proportional to 21,205,463.20, 31,770,716.40 and 20,503,818.40 is: 30,719,489.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,205,463.20 : 31,770,716.40 = 20,503,818.40 : x
  2. Step 2: Convert to fraction form
    21,205,463.20/31,770,716.40 = 20,503,818.40/x
  3. Step 3: Cross multiply
    21,205,463.20x = 31,770,716.40 × 20,503,818.40
  4. Step 4: Simplify right side
    21,205,463.20x = 651,420,999,503,501.62
  5. Step 5: Solve for x
    x = 651,420,999,503,501.62/21,205,463.20
  6. Step 6: Final answer
    x = 30,719,489.28

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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.