Home / 3,972.87-5,484.38-2,981.43

Finding the Fourth Proportional to 3,972.87, 5,484.38 and 2,981.43

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Solution

The fourth proportional to 3,972.87, 5,484.38 and 2,981.43 is: 4,115.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,972.87 : 5,484.38 = 2,981.43 : x
  2. Step 2: Convert to fraction form
    3,972.87/5,484.38 = 2,981.43/x
  3. Step 3: Cross multiply
    3,972.87x = 5,484.38 × 2,981.43
  4. Step 4: Simplify right side
    3,972.87x = 16,351,280.16
  5. Step 5: Solve for x
    x = 16,351,280.16/3,972.87
  6. Step 6: Final answer
    x = 4,115.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.