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Finding the Fourth Proportional to 6,605.76, 9,115.58 and 3,621

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Solution

The fourth proportional to 6,605.76, 9,115.58 and 3,621 is: 4,996.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,605.76 : 9,115.58 = 3,621 : x
  2. Step 2: Convert to fraction form
    6,605.76/9,115.58 = 3,621/x
  3. Step 3: Cross multiply
    6,605.76x = 9,115.58 × 3,621
  4. Step 4: Simplify right side
    6,605.76x = 33,007,515.18
  5. Step 5: Solve for x
    x = 33,007,515.18/6,605.76
  6. Step 6: Final answer
    x = 4,996.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.