Home / 8,664.63-12,999.96-2,821.20

Finding the Fourth Proportional to 8,664.63, 12,999.96 and 2,821.20

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Solution

The fourth proportional to 8,664.63, 12,999.96 and 2,821.20 is: 4,232.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,664.63 : 12,999.96 = 2,821.20 : x
  2. Step 2: Convert to fraction form
    8,664.63/12,999.96 = 2,821.20/x
  3. Step 3: Cross multiply
    8,664.63x = 12,999.96 × 2,821.20
  4. Step 4: Simplify right side
    8,664.63x = 36,675,487.15
  5. Step 5: Solve for x
    x = 36,675,487.15/8,664.63
  6. Step 6: Final answer
    x = 4,232.78

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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.