Home / 5,129.58-7,078.82-2,771.72

Finding the Fourth Proportional to 5,129.58, 7,078.82 and 2,771.72

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Solution

The fourth proportional to 5,129.58, 7,078.82 and 2,771.72 is: 3,824.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.58 : 7,078.82 = 2,771.72 : x
  2. Step 2: Convert to fraction form
    5,129.58/7,078.82 = 2,771.72/x
  3. Step 3: Cross multiply
    5,129.58x = 7,078.82 × 2,771.72
  4. Step 4: Simplify right side
    5,129.58x = 19,620,478.51
  5. Step 5: Solve for x
    x = 19,620,478.51/5,129.58
  6. Step 6: Final answer
    x = 3,824.97

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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.