Home / 3,926.20-5,418.09-2,157.77

Finding the Fourth Proportional to 3,926.20, 5,418.09 and 2,157.77

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Solution

The fourth proportional to 3,926.20, 5,418.09 and 2,157.77 is: 2,977.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,926.20 : 5,418.09 = 2,157.77 : x
  2. Step 2: Convert to fraction form
    3,926.20/5,418.09 = 2,157.77/x
  3. Step 3: Cross multiply
    3,926.20x = 5,418.09 × 2,157.77
  4. Step 4: Simplify right side
    3,926.20x = 11,690,991.85
  5. Step 5: Solve for x
    x = 11,690,991.85/3,926.20
  6. Step 6: Final answer
    x = 2,977.69

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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.