Home / 20,901,906.70-31,376,479.65-12,387,040.90

Finding the Fourth Proportional to 20,901,906.70, 31,376,479.65 and 12,387,040.90

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Solution

The fourth proportional to 20,901,906.70, 31,376,479.65 and 12,387,040.90 is: 18,594,558.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901,906.70 : 31,376,479.65 = 12,387,040.90 : x
  2. Step 2: Convert to fraction form
    20,901,906.70/31,376,479.65 = 12,387,040.90/x
  3. Step 3: Cross multiply
    20,901,906.70x = 31,376,479.65 × 12,387,040.90
  4. Step 4: Simplify right side
    20,901,906.70x = 388,661,736,722,567.69
  5. Step 5: Solve for x
    x = 388,661,736,722,567.69/20,901,906.70
  6. Step 6: Final answer
    x = 18,594,558.97

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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.