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Finding the Fourth Proportional to 18,651.84, 27,979.58 and 5,507.97

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Solution

The fourth proportional to 18,651.84, 27,979.58 and 5,507.97 is: 8,262.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,651.84 : 27,979.58 = 5,507.97 : x
  2. Step 2: Convert to fraction form
    18,651.84/27,979.58 = 5,507.97/x
  3. Step 3: Cross multiply
    18,651.84x = 27,979.58 × 5,507.97
  4. Step 4: Simplify right side
    18,651.84x = 154,110,565.12
  5. Step 5: Solve for x
    x = 154,110,565.12/18,651.84
  6. Step 6: Final answer
    x = 8,262.49

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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.