Home / 13,807.05-20,711.25-3,947.78

Finding the Fourth Proportional to 13,807.05, 20,711.25 and 3,947.78

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Solution

The fourth proportional to 13,807.05, 20,711.25 and 3,947.78 is: 5,921.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,807.05 : 20,711.25 = 3,947.78 : x
  2. Step 2: Convert to fraction form
    13,807.05/20,711.25 = 3,947.78/x
  3. Step 3: Cross multiply
    13,807.05x = 20,711.25 × 3,947.78
  4. Step 4: Simplify right side
    13,807.05x = 81,763,354.97
  5. Step 5: Solve for x
    x = 81,763,354.97/13,807.05
  6. Step 6: Final answer
    x = 5,921.86

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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.