Home / 13,821.30-20,735.13-3,960.66

Finding the Fourth Proportional to 13,821.30, 20,735.13 and 3,960.66

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Solution

The fourth proportional to 13,821.30, 20,735.13 and 3,960.66 is: 5,941.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,821.30 : 20,735.13 = 3,960.66 : x
  2. Step 2: Convert to fraction form
    13,821.30/20,735.13 = 3,960.66/x
  3. Step 3: Cross multiply
    13,821.30x = 20,735.13 × 3,960.66
  4. Step 4: Simplify right side
    13,821.30x = 82,124,799.99
  5. Step 5: Solve for x
    x = 82,124,799.99/13,821.30
  6. Step 6: Final answer
    x = 5,941.90

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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.