Home / 3,923.75-5,414.79-2,131.23

Finding the Fourth Proportional to 3,923.75, 5,414.79 and 2,131.23

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Solution

The fourth proportional to 3,923.75, 5,414.79 and 2,131.23 is: 2,941.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,923.75 : 5,414.79 = 2,131.23 : x
  2. Step 2: Convert to fraction form
    3,923.75/5,414.79 = 2,131.23/x
  3. Step 3: Cross multiply
    3,923.75x = 5,414.79 × 2,131.23
  4. Step 4: Simplify right side
    3,923.75x = 11,540,162.89
  5. Step 5: Solve for x
    x = 11,540,162.89/3,923.75
  6. Step 6: Final answer
    x = 2,941.11

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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.