Home / 7,086.20-9,778.52-3,898.85

Finding the Fourth Proportional to 7,086.20, 9,778.52 and 3,898.85

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Solution

The fourth proportional to 7,086.20, 9,778.52 and 3,898.85 is: 5,380.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,086.20 : 9,778.52 = 3,898.85 : x
  2. Step 2: Convert to fraction form
    7,086.20/9,778.52 = 3,898.85/x
  3. Step 3: Cross multiply
    7,086.20x = 9,778.52 × 3,898.85
  4. Step 4: Simplify right side
    7,086.20x = 38,125,016.90
  5. Step 5: Solve for x
    x = 38,125,016.90/7,086.20
  6. Step 6: Final answer
    x = 5,380.18

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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.