Home / 3,891.26-5,370.12-2,122.97

Finding the Fourth Proportional to 3,891.26, 5,370.12 and 2,122.97

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Solution

The fourth proportional to 3,891.26, 5,370.12 and 2,122.97 is: 2,929.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.26 : 5,370.12 = 2,122.97 : x
  2. Step 2: Convert to fraction form
    3,891.26/5,370.12 = 2,122.97/x
  3. Step 3: Cross multiply
    3,891.26x = 5,370.12 × 2,122.97
  4. Step 4: Simplify right side
    3,891.26x = 11,400,603.66
  5. Step 5: Solve for x
    x = 11,400,603.66/3,891.26
  6. Step 6: Final answer
    x = 2,929.80

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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.