Home / 3,868.09-5,338.31-2,189.90

Finding the Fourth Proportional to 3,868.09, 5,338.31 and 2,189.90

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Solution

The fourth proportional to 3,868.09, 5,338.31 and 2,189.90 is: 3,022.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,868.09 : 5,338.31 = 2,189.90 : x
  2. Step 2: Convert to fraction form
    3,868.09/5,338.31 = 2,189.90/x
  3. Step 3: Cross multiply
    3,868.09x = 5,338.31 × 2,189.90
  4. Step 4: Simplify right side
    3,868.09x = 11,690,367.47
  5. Step 5: Solve for x
    x = 11,690,367.47/3,868.09
  6. Step 6: Final answer
    x = 3,022.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.