Home / 20,948,729.31-28,904,913.81-12,245,218.36

Finding the Fourth Proportional to 20,948,729.31, 28,904,913.81 and 12,245,218.36

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Solution

The fourth proportional to 20,948,729.31, 28,904,913.81 and 12,245,218.36 is: 16,895,868.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,948,729.31 : 28,904,913.81 = 12,245,218.36 : x
  2. Step 2: Convert to fraction form
    20,948,729.31/28,904,913.81 = 12,245,218.36/x
  3. Step 3: Cross multiply
    20,948,729.31x = 28,904,913.81 × 12,245,218.36
  4. Step 4: Simplify right side
    20,948,729.31x = 353,946,981,208,167.25
  5. Step 5: Solve for x
    x = 353,946,981,208,167.25/20,948,729.31
  6. Step 6: Final answer
    x = 16,895,868.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.