Home / 3,880.62-5,355.27-2,112.21

Finding the Fourth Proportional to 3,880.62, 5,355.27 and 2,112.21

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Solution

The fourth proportional to 3,880.62, 5,355.27 and 2,112.21 is: 2,914.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,880.62 : 5,355.27 = 2,112.21 : x
  2. Step 2: Convert to fraction form
    3,880.62/5,355.27 = 2,112.21/x
  3. Step 3: Cross multiply
    3,880.62x = 5,355.27 × 2,112.21
  4. Step 4: Simplify right side
    3,880.62x = 11,311,454.85
  5. Step 5: Solve for x
    x = 11,311,454.85/3,880.62
  6. Step 6: Final answer
    x = 2,914.86

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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.