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Finding the Fourth Proportional to 18,805.25, 25,936.54 and 12,091.50

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Solution

The fourth proportional to 18,805.25, 25,936.54 and 12,091.50 is: 16,676.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,805.25 : 25,936.54 = 12,091.50 : x
  2. Step 2: Convert to fraction form
    18,805.25/25,936.54 = 12,091.50/x
  3. Step 3: Cross multiply
    18,805.25x = 25,936.54 × 12,091.50
  4. Step 4: Simplify right side
    18,805.25x = 313,611,643.18
  5. Step 5: Solve for x
    x = 313,611,643.18/18,805.25
  6. Step 6: Final answer
    x = 16,676.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.