Home / 4,747.20-7,121.92-1,825.60

Finding the Fourth Proportional to 4,747.20, 7,121.92 and 1,825.60

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Solution

The fourth proportional to 4,747.20, 7,121.92 and 1,825.60 is: 2,738.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,747.20 : 7,121.92 = 1,825.60 : x
  2. Step 2: Convert to fraction form
    4,747.20/7,121.92 = 1,825.60/x
  3. Step 3: Cross multiply
    4,747.20x = 7,121.92 × 1,825.60
  4. Step 4: Simplify right side
    4,747.20x = 13,001,777.15
  5. Step 5: Solve for x
    x = 13,001,777.15/4,747.20
  6. Step 6: Final answer
    x = 2,738.83

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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.