Home / 13,769.70-20,655.41-3,909.75

Finding the Fourth Proportional to 13,769.70, 20,655.41 and 3,909.75

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Solution

The fourth proportional to 13,769.70, 20,655.41 and 3,909.75 is: 5,864.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,769.70 : 20,655.41 = 3,909.75 : x
  2. Step 2: Convert to fraction form
    13,769.70/20,655.41 = 3,909.75/x
  3. Step 3: Cross multiply
    13,769.70x = 20,655.41 × 3,909.75
  4. Step 4: Simplify right side
    13,769.70x = 80,757,469.70
  5. Step 5: Solve for x
    x = 80,757,469.70/13,769.70
  6. Step 6: Final answer
    x = 5,864.87

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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.