Home / 3,926.43-5,418.54-2,158.11

Finding the Fourth Proportional to 3,926.43, 5,418.54 and 2,158.11

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Solution

The fourth proportional to 3,926.43, 5,418.54 and 2,158.11 is: 2,978.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,926.43 : 5,418.54 = 2,158.11 : x
  2. Step 2: Convert to fraction form
    3,926.43/5,418.54 = 2,158.11/x
  3. Step 3: Cross multiply
    3,926.43x = 5,418.54 × 2,158.11
  4. Step 4: Simplify right side
    3,926.43x = 11,693,805.36
  5. Step 5: Solve for x
    x = 11,693,805.36/3,926.43
  6. Step 6: Final answer
    x = 2,978.23

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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.