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Finding the Fourth Proportional to 8,664.45, 12,994.65 and 2,817.87

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Solution

The fourth proportional to 8,664.45, 12,994.65 and 2,817.87 is: 4,226.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,664.45 : 12,994.65 = 2,817.87 : x
  2. Step 2: Convert to fraction form
    8,664.45/12,994.65 = 2,817.87/x
  3. Step 3: Cross multiply
    8,664.45x = 12,994.65 × 2,817.87
  4. Step 4: Simplify right side
    8,664.45x = 36,617,234.40
  5. Step 5: Solve for x
    x = 36,617,234.40/8,664.45
  6. Step 6: Final answer
    x = 4,226.15

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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.