Home / 7,939.89-11,909.97-2,745.90

Finding the Fourth Proportional to 7,939.89, 11,909.97 and 2,745.90

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Solution

The fourth proportional to 7,939.89, 11,909.97 and 2,745.90 is: 4,118.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,939.89 : 11,909.97 = 2,745.90 : x
  2. Step 2: Convert to fraction form
    7,939.89/11,909.97 = 2,745.90/x
  3. Step 3: Cross multiply
    7,939.89x = 11,909.97 × 2,745.90
  4. Step 4: Simplify right side
    7,939.89x = 32,703,586.62
  5. Step 5: Solve for x
    x = 32,703,586.62/7,939.89
  6. Step 6: Final answer
    x = 4,118.90

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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.