Home / 13,630.38-20,440.20-5,309.28

Finding the Fourth Proportional to 13,630.38, 20,440.20 and 5,309.28

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Solution

The fourth proportional to 13,630.38, 20,440.20 and 5,309.28 is: 7,961.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,630.38 : 20,440.20 = 5,309.28 : x
  2. Step 2: Convert to fraction form
    13,630.38/20,440.20 = 5,309.28/x
  3. Step 3: Cross multiply
    13,630.38x = 20,440.20 × 5,309.28
  4. Step 4: Simplify right side
    13,630.38x = 108,522,745.06
  5. Step 5: Solve for x
    x = 108,522,745.06/13,630.38
  6. Step 6: Final answer
    x = 7,961.83

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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.