Home / 3,926.48-5,418.36-2,157.80

Finding the Fourth Proportional to 3,926.48, 5,418.36 and 2,157.80

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Solution

The fourth proportional to 3,926.48, 5,418.36 and 2,157.80 is: 2,977.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,926.48 : 5,418.36 = 2,157.80 : x
  2. Step 2: Convert to fraction form
    3,926.48/5,418.36 = 2,157.80/x
  3. Step 3: Cross multiply
    3,926.48x = 5,418.36 × 2,157.80
  4. Step 4: Simplify right side
    3,926.48x = 11,691,737.21
  5. Step 5: Solve for x
    x = 11,691,737.21/3,926.48
  6. Step 6: Final answer
    x = 2,977.66

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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.