Home / 5,129.82-7,079.55-2,861.48

Finding the Fourth Proportional to 5,129.82, 7,079.55 and 2,861.48

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Solution

The fourth proportional to 5,129.82, 7,079.55 and 2,861.48 is: 3,949.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.82 : 7,079.55 = 2,861.48 : x
  2. Step 2: Convert to fraction form
    5,129.82/7,079.55 = 2,861.48/x
  3. Step 3: Cross multiply
    5,129.82x = 7,079.55 × 2,861.48
  4. Step 4: Simplify right side
    5,129.82x = 20,257,990.73
  5. Step 5: Solve for x
    x = 20,257,990.73/5,129.82
  6. Step 6: Final answer
    x = 3,949.06

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1.5x scale

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.