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Finding the Fourth Proportional to 18,220.76, 27,321.75 and 8,351.58

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Solution

The fourth proportional to 18,220.76, 27,321.75 and 8,351.58 is: 12,523.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,220.76 : 27,321.75 = 8,351.58 : x
  2. Step 2: Convert to fraction form
    18,220.76/27,321.75 = 8,351.58/x
  3. Step 3: Cross multiply
    18,220.76x = 27,321.75 × 8,351.58
  4. Step 4: Simplify right side
    18,220.76x = 228,179,780.87
  5. Step 5: Solve for x
    x = 228,179,780.87/18,220.76
  6. Step 6: Final answer
    x = 12,523.07

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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.