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Finding the Fourth Proportional to 8,469.20, 12,703.80 and 8,226.20

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Solution

The fourth proportional to 8,469.20, 12,703.80 and 8,226.20 is: 12,339.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,469.20 : 12,703.80 = 8,226.20 : x
  2. Step 2: Convert to fraction form
    8,469.20/12,703.80 = 8,226.20/x
  3. Step 3: Cross multiply
    8,469.20x = 12,703.80 × 8,226.20
  4. Step 4: Simplify right side
    8,469.20x = 104,503,999.56
  5. Step 5: Solve for x
    x = 104,503,999.56/8,469.20
  6. Step 6: Final answer
    x = 12,339.30

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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.