Home / 3,919.12-5,408.44-2,150.80

Finding the Fourth Proportional to 3,919.12, 5,408.44 and 2,150.80

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Solution

The fourth proportional to 3,919.12, 5,408.44 and 2,150.80 is: 2,968.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.12 : 5,408.44 = 2,150.80 : x
  2. Step 2: Convert to fraction form
    3,919.12/5,408.44 = 2,150.80/x
  3. Step 3: Cross multiply
    3,919.12x = 5,408.44 × 2,150.80
  4. Step 4: Simplify right side
    3,919.12x = 11,632,472.75
  5. Step 5: Solve for x
    x = 11,632,472.75/3,919.12
  6. Step 6: Final answer
    x = 2,968.13

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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.