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Finding the Fourth Proportional to 21,729.25, 29,986.73 and 11,793.25

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Solution

The fourth proportional to 21,729.25, 29,986.73 and 11,793.25 is: 16,274.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,729.25 : 29,986.73 = 11,793.25 : x
  2. Step 2: Convert to fraction form
    21,729.25/29,986.73 = 11,793.25/x
  3. Step 3: Cross multiply
    21,729.25x = 29,986.73 × 11,793.25
  4. Step 4: Simplify right side
    21,729.25x = 353,641,003.57
  5. Step 5: Solve for x
    x = 353,641,003.57/21,729.25
  6. Step 6: Final answer
    x = 16,274.88

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1.5x scale

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.