Home / 3,891.11-5,369.74-2,122.75

Finding the Fourth Proportional to 3,891.11, 5,369.74 and 2,122.75

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Solution

The fourth proportional to 3,891.11, 5,369.74 and 2,122.75 is: 2,929.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.11 : 5,369.74 = 2,122.75 : x
  2. Step 2: Convert to fraction form
    3,891.11/5,369.74 = 2,122.75/x
  3. Step 3: Cross multiply
    3,891.11x = 5,369.74 × 2,122.75
  4. Step 4: Simplify right side
    3,891.11x = 11,398,596.85
  5. Step 5: Solve for x
    x = 11,398,596.85/3,891.11
  6. Step 6: Final answer
    x = 2,929.40

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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.