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Finding the Fourth Proportional to 8,615.81, 12,917.22 and 4,399.68

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Solution

The fourth proportional to 8,615.81, 12,917.22 and 4,399.68 is: 6,596.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.81 : 12,917.22 = 4,399.68 : x
  2. Step 2: Convert to fraction form
    8,615.81/12,917.22 = 4,399.68/x
  3. Step 3: Cross multiply
    8,615.81x = 12,917.22 × 4,399.68
  4. Step 4: Simplify right side
    8,615.81x = 56,831,634.49
  5. Step 5: Solve for x
    x = 56,831,634.49/8,615.81
  6. Step 6: Final answer
    x = 6,596.21

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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.