Home / 3,915.21-5,399.85-3,442.11

Finding the Fourth Proportional to 3,915.21, 5,399.85 and 3,442.11

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Solution

The fourth proportional to 3,915.21, 5,399.85 and 3,442.11 is: 4,747.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.21 : 5,399.85 = 3,442.11 : x
  2. Step 2: Convert to fraction form
    3,915.21/5,399.85 = 3,442.11/x
  3. Step 3: Cross multiply
    3,915.21x = 5,399.85 × 3,442.11
  4. Step 4: Simplify right side
    3,915.21x = 18,586,850.68
  5. Step 5: Solve for x
    x = 18,586,850.68/3,915.21
  6. Step 6: Final answer
    x = 4,747.34

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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.