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Finding the Fourth Proportional to 18,605.20, 27,872.16 and 17,979.88

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Solution

The fourth proportional to 18,605.20, 27,872.16 and 17,979.88 is: 26,935.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,605.20 : 27,872.16 = 17,979.88 : x
  2. Step 2: Convert to fraction form
    18,605.20/27,872.16 = 17,979.88/x
  3. Step 3: Cross multiply
    18,605.20x = 27,872.16 × 17,979.88
  4. Step 4: Simplify right side
    18,605.20x = 501,138,092.14
  5. Step 5: Solve for x
    x = 501,138,092.14/18,605.20
  6. Step 6: Final answer
    x = 26,935.38

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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.