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Finding the Fourth Proportional to 11,921.31, 17,881.97 and 4,524.02

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Solution

The fourth proportional to 11,921.31, 17,881.97 and 4,524.02 is: 6,786.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.31 : 17,881.97 = 4,524.02 : x
  2. Step 2: Convert to fraction form
    11,921.31/17,881.97 = 4,524.02/x
  3. Step 3: Cross multiply
    11,921.31x = 17,881.97 × 4,524.02
  4. Step 4: Simplify right side
    11,921.31x = 80,898,344.95
  5. Step 5: Solve for x
    x = 80,898,344.95/11,921.31
  6. Step 6: Final answer
    x = 6,786.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.