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Finding the Fourth Proportional to 18,732.76, 25,839.78 and 12,016.12

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Solution

The fourth proportional to 18,732.76, 25,839.78 and 12,016.12 is: 16,574.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,732.76 : 25,839.78 = 12,016.12 : x
  2. Step 2: Convert to fraction form
    18,732.76/25,839.78 = 12,016.12/x
  3. Step 3: Cross multiply
    18,732.76x = 25,839.78 × 12,016.12
  4. Step 4: Simplify right side
    18,732.76x = 310,493,897.25
  5. Step 5: Solve for x
    x = 310,493,897.25/18,732.76
  6. Step 6: Final answer
    x = 16,574.91

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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.