Home / 20,901,908.20-31,376,481.90-12,387,042.40

Finding the Fourth Proportional to 20,901,908.20, 31,376,481.90 and 12,387,042.40

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Solution

The fourth proportional to 20,901,908.20, 31,376,481.90 and 12,387,042.40 is: 18,594,561.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901,908.20 : 31,376,481.90 = 12,387,042.40 : x
  2. Step 2: Convert to fraction form
    20,901,908.20/31,376,481.90 = 12,387,042.40/x
  3. Step 3: Cross multiply
    20,901,908.20x = 31,376,481.90 × 12,387,042.40
  4. Step 4: Simplify right side
    20,901,908.20x = 388,661,811,658,132.56
  5. Step 5: Solve for x
    x = 388,661,811,658,132.56/20,901,908.20
  6. Step 6: Final answer
    x = 18,594,561.22

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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.