Home / 3,311.40-4,961.34-3,138.60

Finding the Fourth Proportional to 3,311.40, 4,961.34 and 3,138.60

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Solution

The fourth proportional to 3,311.40, 4,961.34 and 3,138.60 is: 4,702.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,311.40 : 4,961.34 = 3,138.60 : x
  2. Step 2: Convert to fraction form
    3,311.40/4,961.34 = 3,138.60/x
  3. Step 3: Cross multiply
    3,311.40x = 4,961.34 × 3,138.60
  4. Step 4: Simplify right side
    3,311.40x = 15,571,661.72
  5. Step 5: Solve for x
    x = 15,571,661.72/3,311.40
  6. Step 6: Final answer
    x = 4,702.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.