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Finding the Fourth Proportional to 18,811.86, 28,221.03 and 6,333.06

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Solution

The fourth proportional to 18,811.86, 28,221.03 and 6,333.06 is: 9,500.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,811.86 : 28,221.03 = 6,333.06 : x
  2. Step 2: Convert to fraction form
    18,811.86/28,221.03 = 6,333.06/x
  3. Step 3: Cross multiply
    18,811.86x = 28,221.03 × 6,333.06
  4. Step 4: Simplify right side
    18,811.86x = 178,725,476.25
  5. Step 5: Solve for x
    x = 178,725,476.25/18,811.86
  6. Step 6: Final answer
    x = 9,500.68

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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.