Home / 3,926.40-5,418.44-2,158.12

Finding the Fourth Proportional to 3,926.40, 5,418.44 and 2,158.12

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Solution

The fourth proportional to 3,926.40, 5,418.44 and 2,158.12 is: 2,978.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,926.40 : 5,418.44 = 2,158.12 : x
  2. Step 2: Convert to fraction form
    3,926.40/5,418.44 = 2,158.12/x
  3. Step 3: Cross multiply
    3,926.40x = 5,418.44 × 2,158.12
  4. Step 4: Simplify right side
    3,926.40x = 11,693,627.49
  5. Step 5: Solve for x
    x = 11,693,627.49/3,926.40
  6. Step 6: Final answer
    x = 2,978.21

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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.