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Finding the Fourth Proportional to 6,639.88, 9,965.98 and 3,355.28

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Solution

The fourth proportional to 6,639.88, 9,965.98 and 3,355.28 is: 5,036.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.88 : 9,965.98 = 3,355.28 : x
  2. Step 2: Convert to fraction form
    6,639.88/9,965.98 = 3,355.28/x
  3. Step 3: Cross multiply
    6,639.88x = 9,965.98 × 3,355.28
  4. Step 4: Simplify right side
    6,639.88x = 33,438,653.37
  5. Step 5: Solve for x
    x = 33,438,653.37/6,639.88
  6. Step 6: Final answer
    x = 5,036.03

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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.