Home / 21,310.73-29,408.94-11,879.90

Finding the Fourth Proportional to 21,310.73, 29,408.94 and 11,879.90

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Solution

The fourth proportional to 21,310.73, 29,408.94 and 11,879.90 is: 16,394.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,310.73 : 29,408.94 = 11,879.90 : x
  2. Step 2: Convert to fraction form
    21,310.73/29,408.94 = 11,879.90/x
  3. Step 3: Cross multiply
    21,310.73x = 29,408.94 × 11,879.90
  4. Step 4: Simplify right side
    21,310.73x = 349,375,266.31
  5. Step 5: Solve for x
    x = 349,375,266.31/21,310.73
  6. Step 6: Final answer
    x = 16,394.34

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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.