Home / 5,120.20-7,675.30-2,778.09

Finding the Fourth Proportional to 5,120.20, 7,675.30 and 2,778.09

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Solution

The fourth proportional to 5,120.20, 7,675.30 and 2,778.09 is: 4,164.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.20 : 7,675.30 = 2,778.09 : x
  2. Step 2: Convert to fraction form
    5,120.20/7,675.30 = 2,778.09/x
  3. Step 3: Cross multiply
    5,120.20x = 7,675.30 × 2,778.09
  4. Step 4: Simplify right side
    5,120.20x = 21,322,674.18
  5. Step 5: Solve for x
    x = 21,322,674.18/5,120.20
  6. Step 6: Final answer
    x = 4,164.42

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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.