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Finding the Fourth Proportional to 27,187.66, 40,766.91 and 12,392.61

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Solution

The fourth proportional to 27,187.66, 40,766.91 and 12,392.61 is: 18,582.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,187.66 : 40,766.91 = 12,392.61 : x
  2. Step 2: Convert to fraction form
    27,187.66/40,766.91 = 12,392.61/x
  3. Step 3: Cross multiply
    27,187.66x = 40,766.91 × 12,392.61
  4. Step 4: Simplify right side
    27,187.66x = 505,208,416.54
  5. Step 5: Solve for x
    x = 505,208,416.54/27,187.66
  6. Step 6: Final answer
    x = 18,582.27

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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.