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Finding the Fourth Proportional to 21,690.52, 29,932.92 and 11,754.52

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Solution

The fourth proportional to 21,690.52, 29,932.92 and 11,754.52 is: 16,221.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,690.52 : 29,932.92 = 11,754.52 : x
  2. Step 2: Convert to fraction form
    21,690.52/29,932.92 = 11,754.52/x
  3. Step 3: Cross multiply
    21,690.52x = 29,932.92 × 11,754.52
  4. Step 4: Simplify right side
    21,690.52x = 351,847,106.80
  5. Step 5: Solve for x
    x = 351,847,106.80/21,690.52
  6. Step 6: Final answer
    x = 16,221.24

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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.