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Finding the Fourth Proportional to 36,811.88, 55,212.06 and 12,187.88

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Solution

The fourth proportional to 36,811.88, 55,212.06 and 12,187.88 is: 18,279.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,811.88 : 55,212.06 = 12,187.88 : x
  2. Step 2: Convert to fraction form
    36,811.88/55,212.06 = 12,187.88/x
  3. Step 3: Cross multiply
    36,811.88x = 55,212.06 × 12,187.88
  4. Step 4: Simplify right side
    36,811.88x = 672,917,961.83
  5. Step 5: Solve for x
    x = 672,917,961.83/36,811.88
  6. Step 6: Final answer
    x = 18,279.91

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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.