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Finding the Fourth Proportional to 18,348.12, 25,340.99 and 12,369.38

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Solution

The fourth proportional to 18,348.12, 25,340.99 and 12,369.38 is: 17,083.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,348.12 : 25,340.99 = 12,369.38 : x
  2. Step 2: Convert to fraction form
    18,348.12/25,340.99 = 12,369.38/x
  3. Step 3: Cross multiply
    18,348.12x = 25,340.99 × 12,369.38
  4. Step 4: Simplify right side
    18,348.12x = 313,452,146.33
  5. Step 5: Solve for x
    x = 313,452,146.33/18,348.12
  6. Step 6: Final answer
    x = 17,083.61

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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.