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Finding the Fourth Proportional to 18,808.38, 25,943.22 and 12,083.40

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Solution

The fourth proportional to 18,808.38, 25,943.22 and 12,083.40 is: 16,667.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,808.38 : 25,943.22 = 12,083.40 : x
  2. Step 2: Convert to fraction form
    18,808.38/25,943.22 = 12,083.40/x
  3. Step 3: Cross multiply
    18,808.38x = 25,943.22 × 12,083.40
  4. Step 4: Simplify right side
    18,808.38x = 313,482,304.55
  5. Step 5: Solve for x
    x = 313,482,304.55/18,808.38
  6. Step 6: Final answer
    x = 16,667.16

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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.