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Finding the Fourth Proportional to 8,664.38, 12,995.22 and 2,820.95

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Solution

The fourth proportional to 8,664.38, 12,995.22 and 2,820.95 is: 4,230.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,664.38 : 12,995.22 = 2,820.95 : x
  2. Step 2: Convert to fraction form
    8,664.38/12,995.22 = 2,820.95/x
  3. Step 3: Cross multiply
    8,664.38x = 12,995.22 × 2,820.95
  4. Step 4: Simplify right side
    8,664.38x = 36,658,865.86
  5. Step 5: Solve for x
    x = 36,658,865.86/8,664.38
  6. Step 6: Final answer
    x = 4,230.99

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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.