Home / 10,311.40-15,469.26-3,385

Finding the Fourth Proportional to 10,311.40, 15,469.26 and 3,385

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Solution

The fourth proportional to 10,311.40, 15,469.26 and 3,385 is: 5,078.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,311.40 : 15,469.26 = 3,385 : x
  2. Step 2: Convert to fraction form
    10,311.40/15,469.26 = 3,385/x
  3. Step 3: Cross multiply
    10,311.40x = 15,469.26 × 3,385
  4. Step 4: Simplify right side
    10,311.40x = 52,363,445.10
  5. Step 5: Solve for x
    x = 52,363,445.10/10,311.40
  6. Step 6: Final answer
    x = 5,078.21

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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.