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Finding the Fourth Proportional to 18,855.36, 28,272 and 7,169.44

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Solution

The fourth proportional to 18,855.36, 28,272 and 7,169.44 is: 10,749.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,855.36 : 28,272 = 7,169.44 : x
  2. Step 2: Convert to fraction form
    18,855.36/28,272 = 7,169.44/x
  3. Step 3: Cross multiply
    18,855.36x = 28,272 × 7,169.44
  4. Step 4: Simplify right side
    18,855.36x = 202,694,407.68
  5. Step 5: Solve for x
    x = 202,694,407.68/18,855.36
  6. Step 6: Final answer
    x = 10,749.96

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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.