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Finding the Fourth Proportional to 7,919.49, 11,879.22 and 3,241.68

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Solution

The fourth proportional to 7,919.49, 11,879.22 and 3,241.68 is: 4,862.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919.49 : 11,879.22 = 3,241.68 : x
  2. Step 2: Convert to fraction form
    7,919.49/11,879.22 = 3,241.68/x
  3. Step 3: Cross multiply
    7,919.49x = 11,879.22 × 3,241.68
  4. Step 4: Simplify right side
    7,919.49x = 38,508,629.89
  5. Step 5: Solve for x
    x = 38,508,629.89/7,919.49
  6. Step 6: Final answer
    x = 4,862.51

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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.