Home / 21,163.97-31,740.75-8,687.54

Finding the Fourth Proportional to 21,163.97, 31,740.75 and 8,687.54

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Solution

The fourth proportional to 21,163.97, 31,740.75 and 8,687.54 is: 13,029.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,163.97 : 31,740.75 = 8,687.54 : x
  2. Step 2: Convert to fraction form
    21,163.97/31,740.75 = 8,687.54/x
  3. Step 3: Cross multiply
    21,163.97x = 31,740.75 × 8,687.54
  4. Step 4: Simplify right side
    21,163.97x = 275,749,114.61
  5. Step 5: Solve for x
    x = 275,749,114.61/21,163.97
  6. Step 6: Final answer
    x = 13,029.18

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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.