Home / 3,880.85-5,355.49-2,112.50

Finding the Fourth Proportional to 3,880.85, 5,355.49 and 2,112.50

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Solution

The fourth proportional to 3,880.85, 5,355.49 and 2,112.50 is: 2,915.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,880.85 : 5,355.49 = 2,112.50 : x
  2. Step 2: Convert to fraction form
    3,880.85/5,355.49 = 2,112.50/x
  3. Step 3: Cross multiply
    3,880.85x = 5,355.49 × 2,112.50
  4. Step 4: Simplify right side
    3,880.85x = 11,313,472.63
  5. Step 5: Solve for x
    x = 11,313,472.63/3,880.85
  6. Step 6: Final answer
    x = 2,915.20

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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.