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Finding the Fourth Proportional to 18,605.70, 27,893.97 and 12,744.54

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Solution

The fourth proportional to 18,605.70, 27,893.97 and 12,744.54 is: 19,106.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,605.70 : 27,893.97 = 12,744.54 : x
  2. Step 2: Convert to fraction form
    18,605.70/27,893.97 = 12,744.54/x
  3. Step 3: Cross multiply
    18,605.70x = 27,893.97 × 12,744.54
  4. Step 4: Simplify right side
    18,605.70x = 355,495,816.42
  5. Step 5: Solve for x
    x = 355,495,816.42/18,605.70
  6. Step 6: Final answer
    x = 19,106.82

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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.