Home / 3,919.39-5,408.91-2,150.96

Finding the Fourth Proportional to 3,919.39, 5,408.91 and 2,150.96

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Solution

The fourth proportional to 3,919.39, 5,408.91 and 2,150.96 is: 2,968.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.39 : 5,408.91 = 2,150.96 : x
  2. Step 2: Convert to fraction form
    3,919.39/5,408.91 = 2,150.96/x
  3. Step 3: Cross multiply
    3,919.39x = 5,408.91 × 2,150.96
  4. Step 4: Simplify right side
    3,919.39x = 11,634,349.05
  5. Step 5: Solve for x
    x = 11,634,349.05/3,919.39
  6. Step 6: Final answer
    x = 2,968.41

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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.