Home / 3,989.44-5,982.54-1,391.50

Finding the Fourth Proportional to 3,989.44, 5,982.54 and 1,391.50

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Solution

The fourth proportional to 3,989.44, 5,982.54 and 1,391.50 is: 2,086.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.44 : 5,982.54 = 1,391.50 : x
  2. Step 2: Convert to fraction form
    3,989.44/5,982.54 = 1,391.50/x
  3. Step 3: Cross multiply
    3,989.44x = 5,982.54 × 1,391.50
  4. Step 4: Simplify right side
    3,989.44x = 8,324,704.41
  5. Step 5: Solve for x
    x = 8,324,704.41/3,989.44
  6. Step 6: Final answer
    x = 2,086.68

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1.5x scale

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.