Home / 3,939.69-5,905.96-1,965.92

Finding the Fourth Proportional to 3,939.69, 5,905.96 and 1,965.92

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Solution

The fourth proportional to 3,939.69, 5,905.96 and 1,965.92 is: 2,947.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.69 : 5,905.96 = 1,965.92 : x
  2. Step 2: Convert to fraction form
    3,939.69/5,905.96 = 1,965.92/x
  3. Step 3: Cross multiply
    3,939.69x = 5,905.96 × 1,965.92
  4. Step 4: Simplify right side
    3,939.69x = 11,610,654.73
  5. Step 5: Solve for x
    x = 11,610,654.73/3,939.69
  6. Step 6: Final answer
    x = 2,947.10

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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.