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Finding the Fourth Proportional to 18,219.76, 27,329.74 and 5,072.15

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Solution

The fourth proportional to 18,219.76, 27,329.74 and 5,072.15 is: 7,608.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,219.76 : 27,329.74 = 5,072.15 : x
  2. Step 2: Convert to fraction form
    18,219.76/27,329.74 = 5,072.15/x
  3. Step 3: Cross multiply
    18,219.76x = 27,329.74 × 5,072.15
  4. Step 4: Simplify right side
    18,219.76x = 138,620,596.38
  5. Step 5: Solve for x
    x = 138,620,596.38/18,219.76
  6. Step 6: Final answer
    x = 7,608.26

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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.