Home / 3,990.33-5,986.31-1,395.09

Finding the Fourth Proportional to 3,990.33, 5,986.31 and 1,395.09

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Solution

The fourth proportional to 3,990.33, 5,986.31 and 1,395.09 is: 2,092.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.33 : 5,986.31 = 1,395.09 : x
  2. Step 2: Convert to fraction form
    3,990.33/5,986.31 = 1,395.09/x
  3. Step 3: Cross multiply
    3,990.33x = 5,986.31 × 1,395.09
  4. Step 4: Simplify right side
    3,990.33x = 8,351,434.24
  5. Step 5: Solve for x
    x = 8,351,434.24/3,990.33
  6. Step 6: Final answer
    x = 2,092.92

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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.