Home / 18,111.13-27,147.18-7,578.43

Finding the Fourth Proportional to 18,111.13, 27,147.18 and 7,578.43

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Solution

The fourth proportional to 18,111.13, 27,147.18 and 7,578.43 is: 11,359.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,111.13 : 27,147.18 = 7,578.43 : x
  2. Step 2: Convert to fraction form
    18,111.13/27,147.18 = 7,578.43/x
  3. Step 3: Cross multiply
    18,111.13x = 27,147.18 × 7,578.43
  4. Step 4: Simplify right side
    18,111.13x = 205,733,003.33
  5. Step 5: Solve for x
    x = 205,733,003.33/18,111.13
  6. Step 6: Final answer
    x = 11,359.48

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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.