Home / 3,839.87-5,299.30-2,161.45

Finding the Fourth Proportional to 3,839.87, 5,299.30 and 2,161.45

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Solution

The fourth proportional to 3,839.87, 5,299.30 and 2,161.45 is: 2,982.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,839.87 : 5,299.30 = 2,161.45 : x
  2. Step 2: Convert to fraction form
    3,839.87/5,299.30 = 2,161.45/x
  3. Step 3: Cross multiply
    3,839.87x = 5,299.30 × 2,161.45
  4. Step 4: Simplify right side
    3,839.87x = 11,454,145.49
  5. Step 5: Solve for x
    x = 11,454,145.49/3,839.87
  6. Step 6: Final answer
    x = 2,982.95

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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.