Home / 3,919.46-5,408.83-2,151.02

Finding the Fourth Proportional to 3,919.46, 5,408.83 and 2,151.02

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Solution

The fourth proportional to 3,919.46, 5,408.83 and 2,151.02 is: 2,968.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.46 : 5,408.83 = 2,151.02 : x
  2. Step 2: Convert to fraction form
    3,919.46/5,408.83 = 2,151.02/x
  3. Step 3: Cross multiply
    3,919.46x = 5,408.83 × 2,151.02
  4. Step 4: Simplify right side
    3,919.46x = 11,634,505.62
  5. Step 5: Solve for x
    x = 11,634,505.62/3,919.46
  6. Step 6: Final answer
    x = 2,968.40

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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.