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Finding the Fourth Proportional to 21,672.56, 29,908.17 and 11,736.56

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Solution

The fourth proportional to 21,672.56, 29,908.17 and 11,736.56 is: 16,196.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,672.56 : 29,908.17 = 11,736.56 : x
  2. Step 2: Convert to fraction form
    21,672.56/29,908.17 = 11,736.56/x
  3. Step 3: Cross multiply
    21,672.56x = 29,908.17 × 11,736.56
  4. Step 4: Simplify right side
    21,672.56x = 351,019,106.47
  5. Step 5: Solve for x
    x = 351,019,106.47/21,672.56
  6. Step 6: Final answer
    x = 16,196.47

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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.