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Finding the Fourth Proportional to 18,127.98, 27,190.76 and 4,979.25

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Solution

The fourth proportional to 18,127.98, 27,190.76 and 4,979.25 is: 7,468.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,127.98 : 27,190.76 = 4,979.25 : x
  2. Step 2: Convert to fraction form
    18,127.98/27,190.76 = 4,979.25/x
  3. Step 3: Cross multiply
    18,127.98x = 27,190.76 × 4,979.25
  4. Step 4: Simplify right side
    18,127.98x = 135,389,566.83
  5. Step 5: Solve for x
    x = 135,389,566.83/18,127.98
  6. Step 6: Final answer
    x = 7,468.54

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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.