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Finding the Fourth Proportional to 8,663.96, 12,999.02 and 2,820.56

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Solution

The fourth proportional to 8,663.96, 12,999.02 and 2,820.56 is: 4,231.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,663.96 : 12,999.02 = 2,820.56 : x
  2. Step 2: Convert to fraction form
    8,663.96/12,999.02 = 2,820.56/x
  3. Step 3: Cross multiply
    8,663.96x = 12,999.02 × 2,820.56
  4. Step 4: Simplify right side
    8,663.96x = 36,664,515.85
  5. Step 5: Solve for x
    x = 36,664,515.85/8,663.96
  6. Step 6: Final answer
    x = 4,231.84

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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.