Home / 3,121.60-4,685.92-1,968

Finding the Fourth Proportional to 3,121.60, 4,685.92 and 1,968

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Solution

The fourth proportional to 3,121.60, 4,685.92 and 1,968 is: 2,954.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.60 : 4,685.92 = 1,968 : x
  2. Step 2: Convert to fraction form
    3,121.60/4,685.92 = 1,968/x
  3. Step 3: Cross multiply
    3,121.60x = 4,685.92 × 1,968
  4. Step 4: Simplify right side
    3,121.60x = 9,221,890.56
  5. Step 5: Solve for x
    x = 9,221,890.56/3,121.60
  6. Step 6: Final answer
    x = 2,954.22

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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.