Home / 8,512.20-12,768.30-6,438.60

Finding the Fourth Proportional to 8,512.20, 12,768.30 and 6,438.60

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Solution

The fourth proportional to 8,512.20, 12,768.30 and 6,438.60 is: 9,657.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,512.20 : 12,768.30 = 6,438.60 : x
  2. Step 2: Convert to fraction form
    8,512.20/12,768.30 = 6,438.60/x
  3. Step 3: Cross multiply
    8,512.20x = 12,768.30 × 6,438.60
  4. Step 4: Simplify right side
    8,512.20x = 82,209,976.38
  5. Step 5: Solve for x
    x = 82,209,976.38/8,512.20
  6. Step 6: Final answer
    x = 9,657.90

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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.