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Finding the Fourth Proportional to 6,610.20, 9,912.73 and 3,321

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Solution

The fourth proportional to 6,610.20, 9,912.73 and 3,321 is: 4,980.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,610.20 : 9,912.73 = 3,321 : x
  2. Step 2: Convert to fraction form
    6,610.20/9,912.73 = 3,321/x
  3. Step 3: Cross multiply
    6,610.20x = 9,912.73 × 3,321
  4. Step 4: Simplify right side
    6,610.20x = 32,920,168.03
  5. Step 5: Solve for x
    x = 32,920,168.03/6,610.20
  6. Step 6: Final answer
    x = 4,980.21

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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.