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Finding the Fourth Proportional to 18,619.16, 27,934.95 and 7,519.87

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Solution

The fourth proportional to 18,619.16, 27,934.95 and 7,519.87 is: 11,282.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,619.16 : 27,934.95 = 7,519.87 : x
  2. Step 2: Convert to fraction form
    18,619.16/27,934.95 = 7,519.87/x
  3. Step 3: Cross multiply
    18,619.16x = 27,934.95 × 7,519.87
  4. Step 4: Simplify right side
    18,619.16x = 210,067,052.78
  5. Step 5: Solve for x
    x = 210,067,052.78/18,619.16
  6. Step 6: Final answer
    x = 11,282.31

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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.