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Finding the Fourth Proportional to 21,450.89, 29,602.19 and 13,067.39

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Solution

The fourth proportional to 21,450.89, 29,602.19 and 13,067.39 is: 18,032.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,450.89 : 29,602.19 = 13,067.39 : x
  2. Step 2: Convert to fraction form
    21,450.89/29,602.19 = 13,067.39/x
  3. Step 3: Cross multiply
    21,450.89x = 29,602.19 × 13,067.39
  4. Step 4: Simplify right side
    21,450.89x = 386,823,468.26
  5. Step 5: Solve for x
    x = 386,823,468.26/21,450.89
  6. Step 6: Final answer
    x = 18,032.98

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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.