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Finding the Fourth Proportional to 3,995.96, 5,989.88 and 1,912.91

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Solution

The fourth proportional to 3,995.96, 5,989.88 and 1,912.91 is: 2,867.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,995.96 : 5,989.88 = 1,912.91 : x
  2. Step 2: Convert to fraction form
    3,995.96/5,989.88 = 1,912.91/x
  3. Step 3: Cross multiply
    3,995.96x = 5,989.88 × 1,912.91
  4. Step 4: Simplify right side
    3,995.96x = 11,458,061.84
  5. Step 5: Solve for x
    x = 11,458,061.84/3,995.96
  6. Step 6: Final answer
    x = 2,867.42

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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.