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Finding the Fourth Proportional to 8,169.81, 12,255.40 and 2,905.98

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Solution

The fourth proportional to 8,169.81, 12,255.40 and 2,905.98 is: 4,359.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,169.81 : 12,255.40 = 2,905.98 : x
  2. Step 2: Convert to fraction form
    8,169.81/12,255.40 = 2,905.98/x
  3. Step 3: Cross multiply
    8,169.81x = 12,255.40 × 2,905.98
  4. Step 4: Simplify right side
    8,169.81x = 35,613,904.97
  5. Step 5: Solve for x
    x = 35,613,904.97/8,169.81
  6. Step 6: Final answer
    x = 4,359.21

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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.