Home / 3,926.91-5,419.46-2,158.86

Finding the Fourth Proportional to 3,926.91, 5,419.46 and 2,158.86

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Solution

The fourth proportional to 3,926.91, 5,419.46 and 2,158.86 is: 2,979.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,926.91 : 5,419.46 = 2,158.86 : x
  2. Step 2: Convert to fraction form
    3,926.91/5,419.46 = 2,158.86/x
  3. Step 3: Cross multiply
    3,926.91x = 5,419.46 × 2,158.86
  4. Step 4: Simplify right side
    3,926.91x = 11,699,855.42
  5. Step 5: Solve for x
    x = 11,699,855.42/3,926.91
  6. Step 6: Final answer
    x = 2,979.41

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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.