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Finding the Fourth Proportional to 6,279, 9,418.50 and 2,175

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Solution

The fourth proportional to 6,279, 9,418.50 and 2,175 is: 3,262.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,279 : 9,418.50 = 2,175 : x
  2. Step 2: Convert to fraction form
    6,279/9,418.50 = 2,175/x
  3. Step 3: Cross multiply
    6,279x = 9,418.50 × 2,175
  4. Step 4: Simplify right side
    6,279x = 20,485,237.50
  5. Step 5: Solve for x
    x = 20,485,237.50/6,279
  6. Step 6: Final answer
    x = 3,262.50

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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.