Home / 21,221.73-29,286.45-11,661.71

Finding the Fourth Proportional to 21,221.73, 29,286.45 and 11,661.71

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Solution

The fourth proportional to 21,221.73, 29,286.45 and 11,661.71 is: 16,093.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.73 : 29,286.45 = 11,661.71 : x
  2. Step 2: Convert to fraction form
    21,221.73/29,286.45 = 11,661.71/x
  3. Step 3: Cross multiply
    21,221.73x = 29,286.45 × 11,661.71
  4. Step 4: Simplify right side
    21,221.73x = 341,529,940.40
  5. Step 5: Solve for x
    x = 341,529,940.40/21,221.73
  6. Step 6: Final answer
    x = 16,093.41

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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.