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Finding the Fourth Proportional to 18,704.97, 28,035.14 and 8,696.21

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Solution

The fourth proportional to 18,704.97, 28,035.14 and 8,696.21 is: 13,033.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,704.97 : 28,035.14 = 8,696.21 : x
  2. Step 2: Convert to fraction form
    18,704.97/28,035.14 = 8,696.21/x
  3. Step 3: Cross multiply
    18,704.97x = 28,035.14 × 8,696.21
  4. Step 4: Simplify right side
    18,704.97x = 243,799,281.16
  5. Step 5: Solve for x
    x = 243,799,281.16/18,704.97
  6. Step 6: Final answer
    x = 13,033.93

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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.