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Finding the Fourth Proportional to 19,951.86, 29,874.21 and 11,161.74

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Solution

The fourth proportional to 19,951.86, 29,874.21 and 11,161.74 is: 16,712.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,951.86 : 29,874.21 = 11,161.74 : x
  2. Step 2: Convert to fraction form
    19,951.86/29,874.21 = 11,161.74/x
  3. Step 3: Cross multiply
    19,951.86x = 29,874.21 × 11,161.74
  4. Step 4: Simplify right side
    19,951.86x = 333,448,164.73
  5. Step 5: Solve for x
    x = 333,448,164.73/19,951.86
  6. Step 6: Final answer
    x = 16,712.64

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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.