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Finding the Fourth Proportional to 18,661.75, 27,993.17 and 4,810.75

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Solution

The fourth proportional to 18,661.75, 27,993.17 and 4,810.75 is: 7,216.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,661.75 : 27,993.17 = 4,810.75 : x
  2. Step 2: Convert to fraction form
    18,661.75/27,993.17 = 4,810.75/x
  3. Step 3: Cross multiply
    18,661.75x = 27,993.17 × 4,810.75
  4. Step 4: Simplify right side
    18,661.75x = 134,668,142.58
  5. Step 5: Solve for x
    x = 134,668,142.58/18,661.75
  6. Step 6: Final answer
    x = 7,216.27

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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.