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Finding the Fourth Proportional to 18,398.80, 27,584.47 and 5,911.71

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Solution

The fourth proportional to 18,398.80, 27,584.47 and 5,911.71 is: 8,863.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,398.80 : 27,584.47 = 5,911.71 : x
  2. Step 2: Convert to fraction form
    18,398.80/27,584.47 = 5,911.71/x
  3. Step 3: Cross multiply
    18,398.80x = 27,584.47 × 5,911.71
  4. Step 4: Simplify right side
    18,398.80x = 163,071,387.14
  5. Step 5: Solve for x
    x = 163,071,387.14/18,398.80
  6. Step 6: Final answer
    x = 8,863.15

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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.