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Finding the Fourth Proportional to 18,616.63, 25,692.98 and 10,661.47

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Solution

The fourth proportional to 18,616.63, 25,692.98 and 10,661.47 is: 14,713.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,616.63 : 25,692.98 = 10,661.47 : x
  2. Step 2: Convert to fraction form
    18,616.63/25,692.98 = 10,661.47/x
  3. Step 3: Cross multiply
    18,616.63x = 25,692.98 × 10,661.47
  4. Step 4: Simplify right side
    18,616.63x = 273,924,882.17
  5. Step 5: Solve for x
    x = 273,924,882.17/18,616.63
  6. Step 6: Final answer
    x = 14,713.99

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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.