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Finding the Fourth Proportional to 21,691.33, 29,933.79 and 11,755.33

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Solution

The fourth proportional to 21,691.33, 29,933.79 and 11,755.33 is: 16,222.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,691.33 : 29,933.79 = 11,755.33 : x
  2. Step 2: Convert to fraction form
    21,691.33/29,933.79 = 11,755.33/x
  3. Step 3: Cross multiply
    21,691.33x = 29,933.79 × 11,755.33
  4. Step 4: Simplify right side
    21,691.33x = 351,881,579.60
  5. Step 5: Solve for x
    x = 351,881,579.60/21,691.33
  6. Step 6: Final answer
    x = 16,222.22

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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.