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Finding the Fourth Proportional to 18,696.70, 25,794.96 and 11,986.03

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Solution

The fourth proportional to 18,696.70, 25,794.96 and 11,986.03 is: 16,536.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,696.70 : 25,794.96 = 11,986.03 : x
  2. Step 2: Convert to fraction form
    18,696.70/25,794.96 = 11,986.03/x
  3. Step 3: Cross multiply
    18,696.70x = 25,794.96 × 11,986.03
  4. Step 4: Simplify right side
    18,696.70x = 309,179,164.41
  5. Step 5: Solve for x
    x = 309,179,164.41/18,696.70
  6. Step 6: Final answer
    x = 16,536.56

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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.