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Finding the Fourth Proportional to 8,620.34, 12,932.54 and 2,776.74

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Solution

The fourth proportional to 8,620.34, 12,932.54 and 2,776.74 is: 4,165.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,620.34 : 12,932.54 = 2,776.74 : x
  2. Step 2: Convert to fraction form
    8,620.34/12,932.54 = 2,776.74/x
  3. Step 3: Cross multiply
    8,620.34x = 12,932.54 × 2,776.74
  4. Step 4: Simplify right side
    8,620.34x = 35,910,301.12
  5. Step 5: Solve for x
    x = 35,910,301.12/8,620.34
  6. Step 6: Final answer
    x = 4,165.76

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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.