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Finding the Fourth Proportional to 9,359.42, 12,917.88 and 8,612.19

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Solution

The fourth proportional to 9,359.42, 12,917.88 and 8,612.19 is: 11,886.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,359.42 : 12,917.88 = 8,612.19 : x
  2. Step 2: Convert to fraction form
    9,359.42/12,917.88 = 8,612.19/x
  3. Step 3: Cross multiply
    9,359.42x = 12,917.88 × 8,612.19
  4. Step 4: Simplify right side
    9,359.42x = 111,251,236.96
  5. Step 5: Solve for x
    x = 111,251,236.96/9,359.42
  6. Step 6: Final answer
    x = 11,886.56

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Half scale
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Double scale
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Similar ratio
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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.