Home / 21,221.36-29,286.39-11,789.92

Finding the Fourth Proportional to 21,221.36, 29,286.39 and 11,789.92

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Solution

The fourth proportional to 21,221.36, 29,286.39 and 11,789.92 is: 16,270.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.36 : 29,286.39 = 11,789.92 : x
  2. Step 2: Convert to fraction form
    21,221.36/29,286.39 = 11,789.92/x
  3. Step 3: Cross multiply
    21,221.36x = 29,286.39 × 11,789.92
  4. Step 4: Simplify right side
    21,221.36x = 345,284,166.19
  5. Step 5: Solve for x
    x = 345,284,166.19/21,221.36
  6. Step 6: Final answer
    x = 16,270.60

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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.