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Finding the Fourth Proportional to 18,616.38, 25,692.63 and 10,661.22

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Solution

The fourth proportional to 18,616.38, 25,692.63 and 10,661.22 is: 14,713.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,616.38 : 25,692.63 = 10,661.22 : x
  2. Step 2: Convert to fraction form
    18,616.38/25,692.63 = 10,661.22/x
  3. Step 3: Cross multiply
    18,616.38x = 25,692.63 × 10,661.22
  4. Step 4: Simplify right side
    18,616.38x = 273,914,780.81
  5. Step 5: Solve for x
    x = 273,914,780.81/18,616.38
  6. Step 6: Final answer
    x = 14,713.64

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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.