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Finding the Fourth Proportional to 18,796.71, 28,176.62 and 12,132.18

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Solution

The fourth proportional to 18,796.71, 28,176.62 and 12,132.18 is: 18,186.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,796.71 : 28,176.62 = 12,132.18 : x
  2. Step 2: Convert to fraction form
    18,796.71/28,176.62 = 12,132.18/x
  3. Step 3: Cross multiply
    18,796.71x = 28,176.62 × 12,132.18
  4. Step 4: Simplify right side
    18,796.71x = 341,843,764.97
  5. Step 5: Solve for x
    x = 341,843,764.97/18,796.71
  6. Step 6: Final answer
    x = 18,186.36

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1.5x scale

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.