Home / 20,912,694.45-28,861,767.09-12,657,299.87

Finding the Fourth Proportional to 20,912,694.45, 28,861,767.09 and 12,657,299.87

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Solution

The fourth proportional to 20,912,694.45, 28,861,767.09 and 12,657,299.87 is: 17,468,434.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912,694.45 : 28,861,767.09 = 12,657,299.87 : x
  2. Step 2: Convert to fraction form
    20,912,694.45/28,861,767.09 = 12,657,299.87/x
  3. Step 3: Cross multiply
    20,912,694.45x = 28,861,767.09 × 12,657,299.87
  4. Step 4: Simplify right side
    20,912,694.45x = 365,312,040,691,918.44
  5. Step 5: Solve for x
    x = 365,312,040,691,918.44/20,912,694.45
  6. Step 6: Final answer
    x = 17,468,434.86

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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.