Home / 21,679.25-29,922.19-13,179.57

Finding the Fourth Proportional to 21,679.25, 29,922.19 and 13,179.57

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Solution

The fourth proportional to 21,679.25, 29,922.19 and 13,179.57 is: 18,190.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,679.25 : 29,922.19 = 13,179.57 : x
  2. Step 2: Convert to fraction form
    21,679.25/29,922.19 = 13,179.57/x
  3. Step 3: Cross multiply
    21,679.25x = 29,922.19 × 13,179.57
  4. Step 4: Simplify right side
    21,679.25x = 394,361,456.95
  5. Step 5: Solve for x
    x = 394,361,456.95/21,679.25
  6. Step 6: Final answer
    x = 18,190.74

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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.