Home / 3,919.47-5,408.96-2,151.08

Finding the Fourth Proportional to 3,919.47, 5,408.96 and 2,151.08

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Solution

The fourth proportional to 3,919.47, 5,408.96 and 2,151.08 is: 2,968.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.47 : 5,408.96 = 2,151.08 : x
  2. Step 2: Convert to fraction form
    3,919.47/5,408.96 = 2,151.08/x
  3. Step 3: Cross multiply
    3,919.47x = 5,408.96 × 2,151.08
  4. Step 4: Simplify right side
    3,919.47x = 11,635,067.88
  5. Step 5: Solve for x
    x = 11,635,067.88/3,919.47
  6. Step 6: Final answer
    x = 2,968.53

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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.