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Finding the Fourth Proportional to 21,019.68, 29,004 and 12,067.56

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Solution

The fourth proportional to 21,019.68, 29,004 and 12,067.56 is: 16,651.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,019.68 : 29,004 = 12,067.56 : x
  2. Step 2: Convert to fraction form
    21,019.68/29,004 = 12,067.56/x
  3. Step 3: Cross multiply
    21,019.68x = 29,004 × 12,067.56
  4. Step 4: Simplify right side
    21,019.68x = 350,007,510.24
  5. Step 5: Solve for x
    x = 350,007,510.24/21,019.68
  6. Step 6: Final answer
    x = 16,651.42

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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.