Home / 3,891.07-5,369.68-2,122.64

Finding the Fourth Proportional to 3,891.07, 5,369.68 and 2,122.64

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Solution

The fourth proportional to 3,891.07, 5,369.68 and 2,122.64 is: 2,929.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.07 : 5,369.68 = 2,122.64 : x
  2. Step 2: Convert to fraction form
    3,891.07/5,369.68 = 2,122.64/x
  3. Step 3: Cross multiply
    3,891.07x = 5,369.68 × 2,122.64
  4. Step 4: Simplify right side
    3,891.07x = 11,397,897.56
  5. Step 5: Solve for x
    x = 11,397,897.56/3,891.07
  6. Step 6: Final answer
    x = 2,929.25

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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.