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Finding the Fourth Proportional to 18,696.80, 28,046.64 and 5,548.96

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Solution

The fourth proportional to 18,696.80, 28,046.64 and 5,548.96 is: 8,323.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,696.80 : 28,046.64 = 5,548.96 : x
  2. Step 2: Convert to fraction form
    18,696.80/28,046.64 = 5,548.96/x
  3. Step 3: Cross multiply
    18,696.80x = 28,046.64 × 5,548.96
  4. Step 4: Simplify right side
    18,696.80x = 155,629,683.49
  5. Step 5: Solve for x
    x = 155,629,683.49/18,696.80
  6. Step 6: Final answer
    x = 8,323.87

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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.