Home / 3,935.20-5,431.17-2,989.44

Finding the Fourth Proportional to 3,935.20, 5,431.17 and 2,989.44

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Solution

The fourth proportional to 3,935.20, 5,431.17 and 2,989.44 is: 4,125.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.20 : 5,431.17 = 2,989.44 : x
  2. Step 2: Convert to fraction form
    3,935.20/5,431.17 = 2,989.44/x
  3. Step 3: Cross multiply
    3,935.20x = 5,431.17 × 2,989.44
  4. Step 4: Simplify right side
    3,935.20x = 16,236,156.84
  5. Step 5: Solve for x
    x = 16,236,156.84/3,935.20
  6. Step 6: Final answer
    x = 4,125.88

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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.