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Finding the Fourth Proportional to 13,641.77, 18,817.67 and 8,604.17

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Solution

The fourth proportional to 13,641.77, 18,817.67 and 8,604.17 is: 11,868.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,641.77 : 18,817.67 = 8,604.17 : x
  2. Step 2: Convert to fraction form
    13,641.77/18,817.67 = 8,604.17/x
  3. Step 3: Cross multiply
    13,641.77x = 18,817.67 × 8,604.17
  4. Step 4: Simplify right side
    13,641.77x = 161,910,487.12
  5. Step 5: Solve for x
    x = 161,910,487.12/13,641.77
  6. Step 6: Final answer
    x = 11,868.73

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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.