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Finding the Fourth Proportional to 6,615.59, 9,912.20 and 3,279.38

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Solution

The fourth proportional to 6,615.59, 9,912.20 and 3,279.38 is: 4,913.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,615.59 : 9,912.20 = 3,279.38 : x
  2. Step 2: Convert to fraction form
    6,615.59/9,912.20 = 3,279.38/x
  3. Step 3: Cross multiply
    6,615.59x = 9,912.20 × 3,279.38
  4. Step 4: Simplify right side
    6,615.59x = 32,505,804.48
  5. Step 5: Solve for x
    x = 32,505,804.48/6,615.59
  6. Step 6: Final answer
    x = 4,913.52

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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.