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Finding the Fourth Proportional to 18,620.52, 27,921.98 and 6,765.93

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Solution

The fourth proportional to 18,620.52, 27,921.98 and 6,765.93 is: 10,145.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,620.52 : 27,921.98 = 6,765.93 : x
  2. Step 2: Convert to fraction form
    18,620.52/27,921.98 = 6,765.93/x
  3. Step 3: Cross multiply
    18,620.52x = 27,921.98 × 6,765.93
  4. Step 4: Simplify right side
    18,620.52x = 188,918,039.45
  5. Step 5: Solve for x
    x = 188,918,039.45/18,620.52
  6. Step 6: Final answer
    x = 10,145.69

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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.