Home / 3,868.80-5,339.16-2,189.58

Finding the Fourth Proportional to 3,868.80, 5,339.16 and 2,189.58

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Solution

The fourth proportional to 3,868.80, 5,339.16 and 2,189.58 is: 3,021.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,868.80 : 5,339.16 = 2,189.58 : x
  2. Step 2: Convert to fraction form
    3,868.80/5,339.16 = 2,189.58/x
  3. Step 3: Cross multiply
    3,868.80x = 5,339.16 × 2,189.58
  4. Step 4: Simplify right side
    3,868.80x = 11,690,517.95
  5. Step 5: Solve for x
    x = 11,690,517.95/3,868.80
  6. Step 6: Final answer
    x = 3,021.74

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1.5x scale

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.