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Finding the Fourth Proportional to 8,664.58, 12,996.86 and 2,821.18

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Solution

The fourth proportional to 8,664.58, 12,996.86 and 2,821.18 is: 4,231.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,664.58 : 12,996.86 = 2,821.18 : x
  2. Step 2: Convert to fraction form
    8,664.58/12,996.86 = 2,821.18/x
  3. Step 3: Cross multiply
    8,664.58x = 12,996.86 × 2,821.18
  4. Step 4: Simplify right side
    8,664.58x = 36,666,481.49
  5. Step 5: Solve for x
    x = 36,666,481.49/8,664.58
  6. Step 6: Final answer
    x = 4,231.77

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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.