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Finding the Fourth Proportional to 8,863.99, 12,228.87 and 5,085.79

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Solution

The fourth proportional to 8,863.99, 12,228.87 and 5,085.79 is: 7,016.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,863.99 : 12,228.87 = 5,085.79 : x
  2. Step 2: Convert to fraction form
    8,863.99/12,228.87 = 5,085.79/x
  3. Step 3: Cross multiply
    8,863.99x = 12,228.87 × 5,085.79
  4. Step 4: Simplify right side
    8,863.99x = 62,193,453.26
  5. Step 5: Solve for x
    x = 62,193,453.26/8,863.99
  6. Step 6: Final answer
    x = 7,016.42

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Half 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.