Home / 3,981.76-5,970.88-2,132.56

Finding the Fourth Proportional to 3,981.76, 5,970.88 and 2,132.56

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Solution

The fourth proportional to 3,981.76, 5,970.88 and 2,132.56 is: 3,197.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.76 : 5,970.88 = 2,132.56 : x
  2. Step 2: Convert to fraction form
    3,981.76/5,970.88 = 2,132.56/x
  3. Step 3: Cross multiply
    3,981.76x = 5,970.88 × 2,132.56
  4. Step 4: Simplify right side
    3,981.76x = 12,733,259.85
  5. Step 5: Solve for x
    x = 12,733,259.85/3,981.76
  6. Step 6: Final answer
    x = 3,197.90

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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.