Home / 7,939.89-11,901.92-3,979.04

Finding the Fourth Proportional to 7,939.89, 11,901.92 and 3,979.04

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Solution

The fourth proportional to 7,939.89, 11,901.92 and 3,979.04 is: 5,964.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,939.89 : 11,901.92 = 3,979.04 : x
  2. Step 2: Convert to fraction form
    7,939.89/11,901.92 = 3,979.04/x
  3. Step 3: Cross multiply
    7,939.89x = 11,901.92 × 3,979.04
  4. Step 4: Simplify right side
    7,939.89x = 47,358,136.35
  5. Step 5: Solve for x
    x = 47,358,136.35/7,939.89
  6. Step 6: Final answer
    x = 5,964.58

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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.