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Finding the Fourth Proportional to 6,640.02, 9,966.18 and 3,355.43

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Solution

The fourth proportional to 6,640.02, 9,966.18 and 3,355.43 is: 5,036.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,640.02 : 9,966.18 = 3,355.43 : x
  2. Step 2: Convert to fraction form
    6,640.02/9,966.18 = 3,355.43/x
  3. Step 3: Cross multiply
    6,640.02x = 9,966.18 × 3,355.43
  4. Step 4: Simplify right side
    6,640.02x = 33,440,769.53
  5. Step 5: Solve for x
    x = 33,440,769.53/6,640.02
  6. Step 6: Final answer
    x = 5,036.25

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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.