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Finding the Fourth Proportional to 8,662.61, 12,995.28 and 2,817.86

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Solution

The fourth proportional to 8,662.61, 12,995.28 and 2,817.86 is: 4,227.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,662.61 : 12,995.28 = 2,817.86 : x
  2. Step 2: Convert to fraction form
    8,662.61/12,995.28 = 2,817.86/x
  3. Step 3: Cross multiply
    8,662.61x = 12,995.28 × 2,817.86
  4. Step 4: Simplify right side
    8,662.61x = 36,618,814.72
  5. Step 5: Solve for x
    x = 36,618,814.72/8,662.61
  6. Step 6: Final answer
    x = 4,227.23

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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.