Home / 20,626.80-30,951.40-8,778.64

Finding the Fourth Proportional to 20,626.80, 30,951.40 and 8,778.64

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Solution

The fourth proportional to 20,626.80, 30,951.40 and 8,778.64 is: 13,172.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,626.80 : 30,951.40 = 8,778.64 : x
  2. Step 2: Convert to fraction form
    20,626.80/30,951.40 = 8,778.64/x
  3. Step 3: Cross multiply
    20,626.80x = 30,951.40 × 8,778.64
  4. Step 4: Simplify right side
    20,626.80x = 271,711,198.10
  5. Step 5: Solve for x
    x = 271,711,198.10/20,626.80
  6. Step 6: Final answer
    x = 13,172.73

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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.