Home / 21,144.56-29,179.54-11,712.92

Finding the Fourth Proportional to 21,144.56, 29,179.54 and 11,712.92

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Solution

The fourth proportional to 21,144.56, 29,179.54 and 11,712.92 is: 16,163.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,144.56 : 29,179.54 = 11,712.92 : x
  2. Step 2: Convert to fraction form
    21,144.56/29,179.54 = 11,712.92/x
  3. Step 3: Cross multiply
    21,144.56x = 29,179.54 × 11,712.92
  4. Step 4: Simplify right side
    21,144.56x = 341,777,617.66
  5. Step 5: Solve for x
    x = 341,777,617.66/21,144.56
  6. Step 6: Final answer
    x = 16,163.86

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Double scale
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Similar ratio
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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.