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Finding the Fourth Proportional to 21,067.86, 29,071.17 and 11,635.86

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Solution

The fourth proportional to 21,067.86, 29,071.17 and 11,635.86 is: 16,056.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,067.86 : 29,071.17 = 11,635.86 : x
  2. Step 2: Convert to fraction form
    21,067.86/29,071.17 = 11,635.86/x
  3. Step 3: Cross multiply
    21,067.86x = 29,071.17 × 11,635.86
  4. Step 4: Simplify right side
    21,067.86x = 338,268,064.16
  5. Step 5: Solve for x
    x = 338,268,064.16/21,067.86
  6. Step 6: Final answer
    x = 16,056.12

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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.