Home / 5,172.80-7,760.56-2,251.68

Finding the Fourth Proportional to 5,172.80, 7,760.56 and 2,251.68

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Solution

The fourth proportional to 5,172.80, 7,760.56 and 2,251.68 is: 3,378.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.80 : 7,760.56 = 2,251.68 : x
  2. Step 2: Convert to fraction form
    5,172.80/7,760.56 = 2,251.68/x
  3. Step 3: Cross multiply
    5,172.80x = 7,760.56 × 2,251.68
  4. Step 4: Simplify right side
    5,172.80x = 17,474,297.74
  5. Step 5: Solve for x
    x = 17,474,297.74/5,172.80
  6. Step 6: Final answer
    x = 3,378.11

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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.