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Finding the Fourth Proportional to 12,918.52, 17,832.97 and 8,732.44

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Solution

The fourth proportional to 12,918.52, 17,832.97 and 8,732.44 is: 12,054.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,918.52 : 17,832.97 = 8,732.44 : x
  2. Step 2: Convert to fraction form
    12,918.52/17,832.97 = 8,732.44/x
  3. Step 3: Cross multiply
    12,918.52x = 17,832.97 × 8,732.44
  4. Step 4: Simplify right side
    12,918.52x = 155,725,229.55
  5. Step 5: Solve for x
    x = 155,725,229.55/12,918.52
  6. Step 6: Final answer
    x = 12,054.42

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1.5x scale

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.