Home / 21,179.82-29,228.18-11,748.38

Finding the Fourth Proportional to 21,179.82, 29,228.18 and 11,748.38

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Solution

The fourth proportional to 21,179.82, 29,228.18 and 11,748.38 is: 16,212.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.82 : 29,228.18 = 11,748.38 : x
  2. Step 2: Convert to fraction form
    21,179.82/29,228.18 = 11,748.38/x
  3. Step 3: Cross multiply
    21,179.82x = 29,228.18 × 11,748.38
  4. Step 4: Simplify right side
    21,179.82x = 343,383,867.79
  5. Step 5: Solve for x
    x = 343,383,867.79/21,179.82
  6. Step 6: Final answer
    x = 16,212.78

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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.