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Finding the Fourth Proportional to 18,617.31, 27,921.87 and 11,933.73

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Solution

The fourth proportional to 18,617.31, 27,921.87 and 11,933.73 is: 17,897.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,617.31 : 27,921.87 = 11,933.73 : x
  2. Step 2: Convert to fraction form
    18,617.31/27,921.87 = 11,933.73/x
  3. Step 3: Cross multiply
    18,617.31x = 27,921.87 × 11,933.73
  4. Step 4: Simplify right side
    18,617.31x = 333,212,057.68
  5. Step 5: Solve for x
    x = 333,212,057.68/18,617.31
  6. Step 6: Final answer
    x = 17,897.97

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1.5x scale

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.