Home / 3,986.26-5,508.63-2,989.81

Finding the Fourth Proportional to 3,986.26, 5,508.63 and 2,989.81

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Solution

The fourth proportional to 3,986.26, 5,508.63 and 2,989.81 is: 4,131.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.26 : 5,508.63 = 2,989.81 : x
  2. Step 2: Convert to fraction form
    3,986.26/5,508.63 = 2,989.81/x
  3. Step 3: Cross multiply
    3,986.26x = 5,508.63 × 2,989.81
  4. Step 4: Simplify right side
    3,986.26x = 16,469,760.21
  5. Step 5: Solve for x
    x = 16,469,760.21/3,986.26
  6. Step 6: Final answer
    x = 4,131.63

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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.