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Finding the Fourth Proportional to 8,604.40, 12,906.60 and 5,105.20

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Solution

The fourth proportional to 8,604.40, 12,906.60 and 5,105.20 is: 7,657.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,604.40 : 12,906.60 = 5,105.20 : x
  2. Step 2: Convert to fraction form
    8,604.40/12,906.60 = 5,105.20/x
  3. Step 3: Cross multiply
    8,604.40x = 12,906.60 × 5,105.20
  4. Step 4: Simplify right side
    8,604.40x = 65,890,774.32
  5. Step 5: Solve for x
    x = 65,890,774.32/8,604.40
  6. Step 6: Final answer
    x = 7,657.80

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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.