Home / 3,986.14-5,508.46-2,989.69

Finding the Fourth Proportional to 3,986.14, 5,508.46 and 2,989.69

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Solution

The fourth proportional to 3,986.14, 5,508.46 and 2,989.69 is: 4,131.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.14 : 5,508.46 = 2,989.69 : x
  2. Step 2: Convert to fraction form
    3,986.14/5,508.46 = 2,989.69/x
  3. Step 3: Cross multiply
    3,986.14x = 5,508.46 × 2,989.69
  4. Step 4: Simplify right side
    3,986.14x = 16,468,550.60
  5. Step 5: Solve for x
    x = 16,468,550.60/3,986.14
  6. Step 6: Final answer
    x = 4,131.46

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1.5x scale

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.