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Finding the Fourth Proportional to 11,187.20, 16,786.20 and 7,893.20

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Solution

The fourth proportional to 11,187.20, 16,786.20 and 7,893.20 is: 11,843.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,187.20 : 16,786.20 = 7,893.20 : x
  2. Step 2: Convert to fraction form
    11,187.20/16,786.20 = 7,893.20/x
  3. Step 3: Cross multiply
    11,187.20x = 16,786.20 × 7,893.20
  4. Step 4: Simplify right side
    11,187.20x = 132,496,833.84
  5. Step 5: Solve for x
    x = 132,496,833.84/11,187.20
  6. Step 6: Final answer
    x = 11,843.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.