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Finding the Fourth Proportional to 6,640.31, 9,966.62 and 3,355.70

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Solution

The fourth proportional to 6,640.31, 9,966.62 and 3,355.70 is: 5,036.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,640.31 : 9,966.62 = 3,355.70 : x
  2. Step 2: Convert to fraction form
    6,640.31/9,966.62 = 3,355.70/x
  3. Step 3: Cross multiply
    6,640.31x = 9,966.62 × 3,355.70
  4. Step 4: Simplify right side
    6,640.31x = 33,444,969.96
  5. Step 5: Solve for x
    x = 33,444,969.96/6,640.31
  6. Step 6: Final answer
    x = 5,036.66

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1.5x scale

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.