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Finding the Fourth Proportional to 18,806.58, 28,190.16 and 8,934.03

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Solution

The fourth proportional to 18,806.58, 28,190.16 and 8,934.03 is: 13,391.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,806.58 : 28,190.16 = 8,934.03 : x
  2. Step 2: Convert to fraction form
    18,806.58/28,190.16 = 8,934.03/x
  3. Step 3: Cross multiply
    18,806.58x = 28,190.16 × 8,934.03
  4. Step 4: Simplify right side
    18,806.58x = 251,851,735.14
  5. Step 5: Solve for x
    x = 251,851,735.14/18,806.58
  6. Step 6: Final answer
    x = 13,391.68

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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.