Home / 21,221.43-29,286.06-11,661.91

Finding the Fourth Proportional to 21,221.43, 29,286.06 and 11,661.91

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Solution

The fourth proportional to 21,221.43, 29,286.06 and 11,661.91 is: 16,093.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.43 : 29,286.06 = 11,661.91 : x
  2. Step 2: Convert to fraction form
    21,221.43/29,286.06 = 11,661.91/x
  3. Step 3: Cross multiply
    21,221.43x = 29,286.06 × 11,661.91
  4. Step 4: Simplify right side
    21,221.43x = 341,531,279.03
  5. Step 5: Solve for x
    x = 341,531,279.03/21,221.43
  6. Step 6: Final answer
    x = 16,093.70

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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.