Home / 5,129.78-7,079.10-2,771.92

Finding the Fourth Proportional to 5,129.78, 7,079.10 and 2,771.92

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Solution

The fourth proportional to 5,129.78, 7,079.10 and 2,771.92 is: 3,825.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.78 : 7,079.10 = 2,771.92 : x
  2. Step 2: Convert to fraction form
    5,129.78/7,079.10 = 2,771.92/x
  3. Step 3: Cross multiply
    5,129.78x = 7,079.10 × 2,771.92
  4. Step 4: Simplify right side
    5,129.78x = 19,622,698.87
  5. Step 5: Solve for x
    x = 19,622,698.87/5,129.78
  6. Step 6: Final answer
    x = 3,825.25

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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.