Home / 8,121.56-12,183.26-3,190.55

Finding the Fourth Proportional to 8,121.56, 12,183.26 and 3,190.55

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Solution

The fourth proportional to 8,121.56, 12,183.26 and 3,190.55 is: 4,786.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.56 : 12,183.26 = 3,190.55 : x
  2. Step 2: Convert to fraction form
    8,121.56/12,183.26 = 3,190.55/x
  3. Step 3: Cross multiply
    8,121.56x = 12,183.26 × 3,190.55
  4. Step 4: Simplify right side
    8,121.56x = 38,871,223.32
  5. Step 5: Solve for x
    x = 38,871,223.32/8,121.56
  6. Step 6: Final answer
    x = 4,786.18

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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.