Home / 2,912.45-4,020.05-1,981.49

Finding the Fourth Proportional to 2,912.45, 4,020.05 and 1,981.49

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Solution

The fourth proportional to 2,912.45, 4,020.05 and 1,981.49 is: 2,735.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,912.45 : 4,020.05 = 1,981.49 : x
  2. Step 2: Convert to fraction form
    2,912.45/4,020.05 = 1,981.49/x
  3. Step 3: Cross multiply
    2,912.45x = 4,020.05 × 1,981.49
  4. Step 4: Simplify right side
    2,912.45x = 7,965,673.73
  5. Step 5: Solve for x
    x = 7,965,673.73/2,912.45
  6. Step 6: Final answer
    x = 2,735.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.