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Finding the Fourth Proportional to 21,729.94, 29,987.31 and 11,793.94

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Solution

The fourth proportional to 21,729.94, 29,987.31 and 11,793.94 is: 16,275.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,729.94 : 29,987.31 = 11,793.94 : x
  2. Step 2: Convert to fraction form
    21,729.94/29,987.31 = 11,793.94/x
  3. Step 3: Cross multiply
    21,729.94x = 29,987.31 × 11,793.94
  4. Step 4: Simplify right side
    21,729.94x = 353,668,504.16
  5. Step 5: Solve for x
    x = 353,668,504.16/21,729.94
  6. Step 6: Final answer
    x = 16,275.63

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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.