Home / 3,997.78-5,986.17-2,821.43

Finding the Fourth Proportional to 3,997.78, 5,986.17 and 2,821.43

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Solution

The fourth proportional to 3,997.78, 5,986.17 and 2,821.43 is: 4,224.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,997.78 : 5,986.17 = 2,821.43 : x
  2. Step 2: Convert to fraction form
    3,997.78/5,986.17 = 2,821.43/x
  3. Step 3: Cross multiply
    3,997.78x = 5,986.17 × 2,821.43
  4. Step 4: Simplify right side
    3,997.78x = 16,889,574.59
  5. Step 5: Solve for x
    x = 16,889,574.59/3,997.78
  6. Step 6: Final answer
    x = 4,224.74

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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.