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Finding the Fourth Proportional to 11,694.59, 16,138.06 and 6,389.59

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Solution

The fourth proportional to 11,694.59, 16,138.06 and 6,389.59 is: 8,817.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,694.59 : 16,138.06 = 6,389.59 : x
  2. Step 2: Convert to fraction form
    11,694.59/16,138.06 = 6,389.59/x
  3. Step 3: Cross multiply
    11,694.59x = 16,138.06 × 6,389.59
  4. Step 4: Simplify right side
    11,694.59x = 103,115,586.80
  5. Step 5: Solve for x
    x = 103,115,586.80/11,694.59
  6. Step 6: Final answer
    x = 8,817.38

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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.