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Finding the Fourth Proportional to 18,531, 27,799.38 and 6,221.88

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Solution

The fourth proportional to 18,531, 27,799.38 and 6,221.88 is: 9,333.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,531 : 27,799.38 = 6,221.88 : x
  2. Step 2: Convert to fraction form
    18,531/27,799.38 = 6,221.88/x
  3. Step 3: Cross multiply
    18,531x = 27,799.38 × 6,221.88
  4. Step 4: Simplify right side
    18,531x = 172,964,406.43
  5. Step 5: Solve for x
    x = 172,964,406.43/18,531
  6. Step 6: Final answer
    x = 9,333.79

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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.