Home / 5,418.78-8,126.73-2,131.26

Finding the Fourth Proportional to 5,418.78, 8,126.73 and 2,131.26

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Solution

The fourth proportional to 5,418.78, 8,126.73 and 2,131.26 is: 3,196.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.78 : 8,126.73 = 2,131.26 : x
  2. Step 2: Convert to fraction form
    5,418.78/8,126.73 = 2,131.26/x
  3. Step 3: Cross multiply
    5,418.78x = 8,126.73 × 2,131.26
  4. Step 4: Simplify right side
    5,418.78x = 17,320,174.58
  5. Step 5: Solve for x
    x = 17,320,174.58/5,418.78
  6. Step 6: Final answer
    x = 3,196.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.