Home / 3,960.40-5,939.20-1,362.72

Finding the Fourth Proportional to 3,960.40, 5,939.20 and 1,362.72

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Solution

The fourth proportional to 3,960.40, 5,939.20 and 1,362.72 is: 2,043.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,960.40 : 5,939.20 = 1,362.72 : x
  2. Step 2: Convert to fraction form
    3,960.40/5,939.20 = 1,362.72/x
  3. Step 3: Cross multiply
    3,960.40x = 5,939.20 × 1,362.72
  4. Step 4: Simplify right side
    3,960.40x = 8,093,466.62
  5. Step 5: Solve for x
    x = 8,093,466.62/3,960.40
  6. Step 6: Final answer
    x = 2,043.60

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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.