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Finding the Fourth Proportional to 18,663.95, 27,998.97 and 5,517.65

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Solution

The fourth proportional to 18,663.95, 27,998.97 and 5,517.65 is: 8,277.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,663.95 : 27,998.97 = 5,517.65 : x
  2. Step 2: Convert to fraction form
    18,663.95/27,998.97 = 5,517.65/x
  3. Step 3: Cross multiply
    18,663.95x = 27,998.97 × 5,517.65
  4. Step 4: Simplify right side
    18,663.95x = 154,488,566.13
  5. Step 5: Solve for x
    x = 154,488,566.13/18,663.95
  6. Step 6: Final answer
    x = 8,277.38

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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.