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Finding the Fourth Proportional to 21,630.88, 29,850.61 and 11,694.88

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Solution

The fourth proportional to 21,630.88, 29,850.61 and 11,694.88 is: 16,138.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,630.88 : 29,850.61 = 11,694.88 : x
  2. Step 2: Convert to fraction form
    21,630.88/29,850.61 = 11,694.88/x
  3. Step 3: Cross multiply
    21,630.88x = 29,850.61 × 11,694.88
  4. Step 4: Simplify right side
    21,630.88x = 349,099,152.62
  5. Step 5: Solve for x
    x = 349,099,152.62/21,630.88
  6. Step 6: Final answer
    x = 16,138.93

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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.