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Finding the Fourth Proportional to 8,619.93, 11,896.89 and 8,057.12

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Solution

The fourth proportional to 8,619.93, 11,896.89 and 8,057.12 is: 11,120.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.93 : 11,896.89 = 8,057.12 : x
  2. Step 2: Convert to fraction form
    8,619.93/11,896.89 = 8,057.12/x
  3. Step 3: Cross multiply
    8,619.93x = 11,896.89 × 8,057.12
  4. Step 4: Simplify right side
    8,619.93x = 95,854,715.21
  5. Step 5: Solve for x
    x = 95,854,715.21/8,619.93
  6. Step 6: Final answer
    x = 11,120.12

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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.