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Finding the Fourth Proportional to 21,241.98, 31,866.79 and 8,755.17

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Solution

The fourth proportional to 21,241.98, 31,866.79 and 8,755.17 is: 13,134.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,241.98 : 31,866.79 = 8,755.17 : x
  2. Step 2: Convert to fraction form
    21,241.98/31,866.79 = 8,755.17/x
  3. Step 3: Cross multiply
    21,241.98x = 31,866.79 × 8,755.17
  4. Step 4: Simplify right side
    21,241.98x = 278,999,163.80
  5. Step 5: Solve for x
    x = 278,999,163.80/21,241.98
  6. Step 6: Final answer
    x = 13,134.33

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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.