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Finding the Fourth Proportional to 18,806.67, 25,942.90 and 11,988.03

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Solution

The fourth proportional to 18,806.67, 25,942.90 and 11,988.03 is: 16,536.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,806.67 : 25,942.90 = 11,988.03 : x
  2. Step 2: Convert to fraction form
    18,806.67/25,942.90 = 11,988.03/x
  3. Step 3: Cross multiply
    18,806.67x = 25,942.90 × 11,988.03
  4. Step 4: Simplify right side
    18,806.67x = 311,004,263.49
  5. Step 5: Solve for x
    x = 311,004,263.49/18,806.67
  6. Step 6: Final answer
    x = 16,536.91

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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.