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Finding the Fourth Proportional to 8,666.02, 12,994.71 and 2,821.90

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Solution

The fourth proportional to 8,666.02, 12,994.71 and 2,821.90 is: 4,231.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.02 : 12,994.71 = 2,821.90 : x
  2. Step 2: Convert to fraction form
    8,666.02/12,994.71 = 2,821.90/x
  3. Step 3: Cross multiply
    8,666.02x = 12,994.71 × 2,821.90
  4. Step 4: Simplify right side
    8,666.02x = 36,669,772.15
  5. Step 5: Solve for x
    x = 36,669,772.15/8,666.02
  6. Step 6: Final answer
    x = 4,231.44

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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.