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Finding the Fourth Proportional to 8,906.45, 13,355.80 and 4,227.80

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Solution

The fourth proportional to 8,906.45, 13,355.80 and 4,227.80 is: 6,339.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,906.45 : 13,355.80 = 4,227.80 : x
  2. Step 2: Convert to fraction form
    8,906.45/13,355.80 = 4,227.80/x
  3. Step 3: Cross multiply
    8,906.45x = 13,355.80 × 4,227.80
  4. Step 4: Simplify right side
    8,906.45x = 56,465,573.89
  5. Step 5: Solve for x
    x = 56,465,573.89/8,906.45
  6. Step 6: Final answer
    x = 6,339.86

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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.