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Finding the Fourth Proportional to 8,620.22, 12,932.36 and 2,776.61

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Solution

The fourth proportional to 8,620.22, 12,932.36 and 2,776.61 is: 4,165.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,620.22 : 12,932.36 = 2,776.61 : x
  2. Step 2: Convert to fraction form
    8,620.22/12,932.36 = 2,776.61/x
  3. Step 3: Cross multiply
    8,620.22x = 12,932.36 × 2,776.61
  4. Step 4: Simplify right side
    8,620.22x = 35,908,041.55
  5. Step 5: Solve for x
    x = 35,908,041.55/8,620.22
  6. Step 6: Final answer
    x = 4,165.56

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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.