Home / 3,942.60-5,905.80-1,995.90

Finding the Fourth Proportional to 3,942.60, 5,905.80 and 1,995.90

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Solution

The fourth proportional to 3,942.60, 5,905.80 and 1,995.90 is: 2,989.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,942.60 : 5,905.80 = 1,995.90 : x
  2. Step 2: Convert to fraction form
    3,942.60/5,905.80 = 1,995.90/x
  3. Step 3: Cross multiply
    3,942.60x = 5,905.80 × 1,995.90
  4. Step 4: Simplify right side
    3,942.60x = 11,787,386.22
  5. Step 5: Solve for x
    x = 11,787,386.22/3,942.60
  6. Step 6: Final answer
    x = 2,989.75

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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.