Home / 20,981,988.57-31,438,188.24-12,759,759

Finding the Fourth Proportional to 20,981,988.57, 31,438,188.24 and 12,759,759

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Solution

The fourth proportional to 20,981,988.57, 31,438,188.24 and 12,759,759 is: 19,118,478.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981,988.57 : 31,438,188.24 = 12,759,759 : x
  2. Step 2: Convert to fraction form
    20,981,988.57/31,438,188.24 = 12,759,759/x
  3. Step 3: Cross multiply
    20,981,988.57x = 31,438,188.24 × 12,759,759
  4. Step 4: Simplify right side
    20,981,988.57x = 401,143,705,339,034.12
  5. Step 5: Solve for x
    x = 401,143,705,339,034.12/20,981,988.57
  6. Step 6: Final answer
    x = 19,118,478.88

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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.