Home / 21,221.84-29,286.42-11,791.28

Finding the Fourth Proportional to 21,221.84, 29,286.42 and 11,791.28

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Solution

The fourth proportional to 21,221.84, 29,286.42 and 11,791.28 is: 16,272.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.84 : 29,286.42 = 11,791.28 : x
  2. Step 2: Convert to fraction form
    21,221.84/29,286.42 = 11,791.28/x
  3. Step 3: Cross multiply
    21,221.84x = 29,286.42 × 11,791.28
  4. Step 4: Simplify right side
    21,221.84x = 345,324,378.42
  5. Step 5: Solve for x
    x = 345,324,378.42/21,221.84
  6. Step 6: Final answer
    x = 16,272.12

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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.