Home / 7,921.80-11,874.46-2,988.04

Finding the Fourth Proportional to 7,921.80, 11,874.46 and 2,988.04

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Solution

The fourth proportional to 7,921.80, 11,874.46 and 2,988.04 is: 4,478.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.80 : 11,874.46 = 2,988.04 : x
  2. Step 2: Convert to fraction form
    7,921.80/11,874.46 = 2,988.04/x
  3. Step 3: Cross multiply
    7,921.80x = 11,874.46 × 2,988.04
  4. Step 4: Simplify right side
    7,921.80x = 35,481,361.46
  5. Step 5: Solve for x
    x = 35,481,361.46/7,921.80
  6. Step 6: Final answer
    x = 4,478.95

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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.