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Finding the Fourth Proportional to 6,640.11, 9,966.31 and 3,355.49

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Solution

The fourth proportional to 6,640.11, 9,966.31 and 3,355.49 is: 5,036.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,640.11 : 9,966.31 = 3,355.49 : x
  2. Step 2: Convert to fraction form
    6,640.11/9,966.31 = 3,355.49/x
  3. Step 3: Cross multiply
    6,640.11x = 9,966.31 × 3,355.49
  4. Step 4: Simplify right side
    6,640.11x = 33,441,870.07
  5. Step 5: Solve for x
    x = 33,441,870.07/6,640.11
  6. Step 6: Final answer
    x = 5,036.34

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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.