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Finding the Fourth Proportional to 9,863.66, 13,620.71 and 9,174.75

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Solution

The fourth proportional to 9,863.66, 13,620.71 and 9,174.75 is: 12,669.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,863.66 : 13,620.71 = 9,174.75 : x
  2. Step 2: Convert to fraction form
    9,863.66/13,620.71 = 9,174.75/x
  3. Step 3: Cross multiply
    9,863.66x = 13,620.71 × 9,174.75
  4. Step 4: Simplify right side
    9,863.66x = 124,966,563.20
  5. Step 5: Solve for x
    x = 124,966,563.20/9,863.66
  6. Step 6: Final answer
    x = 12,669.40

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Double scale
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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.