Home / 3,939.53-5,911.13-1,965.31

Finding the Fourth Proportional to 3,939.53, 5,911.13 and 1,965.31

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Solution

The fourth proportional to 3,939.53, 5,911.13 and 1,965.31 is: 2,948.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.53 : 5,911.13 = 1,965.31 : x
  2. Step 2: Convert to fraction form
    3,939.53/5,911.13 = 1,965.31/x
  3. Step 3: Cross multiply
    3,939.53x = 5,911.13 × 1,965.31
  4. Step 4: Simplify right side
    3,939.53x = 11,617,193.04
  5. Step 5: Solve for x
    x = 11,617,193.04/3,939.53
  6. Step 6: Final answer
    x = 2,948.88

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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.