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Finding the Fourth Proportional to 8,786.54, 12,128.94 and 5,249.09

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Solution

The fourth proportional to 8,786.54, 12,128.94 and 5,249.09 is: 7,245.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,786.54 : 12,128.94 = 5,249.09 : x
  2. Step 2: Convert to fraction form
    8,786.54/12,128.94 = 5,249.09/x
  3. Step 3: Cross multiply
    8,786.54x = 12,128.94 × 5,249.09
  4. Step 4: Simplify right side
    8,786.54x = 63,665,837.02
  5. Step 5: Solve for x
    x = 63,665,837.02/8,786.54
  6. Step 6: Final answer
    x = 7,245.84

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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.