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Finding the Fourth Proportional to 8,627.68, 12,909.30 and 7,226.20

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Solution

The fourth proportional to 8,627.68, 12,909.30 and 7,226.20 is: 10,812.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,627.68 : 12,909.30 = 7,226.20 : x
  2. Step 2: Convert to fraction form
    8,627.68/12,909.30 = 7,226.20/x
  3. Step 3: Cross multiply
    8,627.68x = 12,909.30 × 7,226.20
  4. Step 4: Simplify right side
    8,627.68x = 93,285,183.66
  5. Step 5: Solve for x
    x = 93,285,183.66/8,627.68
  6. Step 6: Final answer
    x = 10,812.31

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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.