Home / 21,091.73-31,660.09-9,089.82

Finding the Fourth Proportional to 21,091.73, 31,660.09 and 9,089.82

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Solution

The fourth proportional to 21,091.73, 31,660.09 and 9,089.82 is: 13,644.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,091.73 : 31,660.09 = 9,089.82 : x
  2. Step 2: Convert to fraction form
    21,091.73/31,660.09 = 9,089.82/x
  3. Step 3: Cross multiply
    21,091.73x = 31,660.09 × 9,089.82
  4. Step 4: Simplify right side
    21,091.73x = 287,784,496.56
  5. Step 5: Solve for x
    x = 287,784,496.56/21,091.73
  6. Step 6: Final answer
    x = 13,644.43

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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.