Home / 6,520.70-9,781.05-2,138.60

Finding the Fourth Proportional to 6,520.70, 9,781.05 and 2,138.60

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Solution

The fourth proportional to 6,520.70, 9,781.05 and 2,138.60 is: 3,207.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,520.70 : 9,781.05 = 2,138.60 : x
  2. Step 2: Convert to fraction form
    6,520.70/9,781.05 = 2,138.60/x
  3. Step 3: Cross multiply
    6,520.70x = 9,781.05 × 2,138.60
  4. Step 4: Simplify right side
    6,520.70x = 20,917,753.53
  5. Step 5: Solve for x
    x = 20,917,753.53/6,520.70
  6. Step 6: Final answer
    x = 3,207.90

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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.