Home / 3,890.20-5,366.82-2,839.96

Finding the Fourth Proportional to 3,890.20, 5,366.82 and 2,839.96

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Solution

The fourth proportional to 3,890.20, 5,366.82 and 2,839.96 is: 3,917.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.20 : 5,366.82 = 2,839.96 : x
  2. Step 2: Convert to fraction form
    3,890.20/5,366.82 = 2,839.96/x
  3. Step 3: Cross multiply
    3,890.20x = 5,366.82 × 2,839.96
  4. Step 4: Simplify right side
    3,890.20x = 15,241,554.13
  5. Step 5: Solve for x
    x = 15,241,554.13/3,890.20
  6. Step 6: Final answer
    x = 3,917.94

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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.