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Finding the Fourth Proportional to 18,642.97, 27,965.33 and 5,495.45

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Solution

The fourth proportional to 18,642.97, 27,965.33 and 5,495.45 is: 8,243.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,642.97 : 27,965.33 = 5,495.45 : x
  2. Step 2: Convert to fraction form
    18,642.97/27,965.33 = 5,495.45/x
  3. Step 3: Cross multiply
    18,642.97x = 27,965.33 × 5,495.45
  4. Step 4: Simplify right side
    18,642.97x = 153,682,045.27
  5. Step 5: Solve for x
    x = 153,682,045.27/18,642.97
  6. Step 6: Final answer
    x = 8,243.43

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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.