Home / 3,989.16-5,982.84-1,392.12

Finding the Fourth Proportional to 3,989.16, 5,982.84 and 1,392.12

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Solution

The fourth proportional to 3,989.16, 5,982.84 and 1,392.12 is: 2,087.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.16 : 5,982.84 = 1,392.12 : x
  2. Step 2: Convert to fraction form
    3,989.16/5,982.84 = 1,392.12/x
  3. Step 3: Cross multiply
    3,989.16x = 5,982.84 × 1,392.12
  4. Step 4: Simplify right side
    3,989.16x = 8,328,831.22
  5. Step 5: Solve for x
    x = 8,328,831.22/3,989.16
  6. Step 6: Final answer
    x = 2,087.87

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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.