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Finding the Fourth Proportional to 8,620.11, 12,930.17 and 2,777.58

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Solution

The fourth proportional to 8,620.11, 12,930.17 and 2,777.58 is: 4,166.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,620.11 : 12,930.17 = 2,777.58 : x
  2. Step 2: Convert to fraction form
    8,620.11/12,930.17 = 2,777.58/x
  3. Step 3: Cross multiply
    8,620.11x = 12,930.17 × 2,777.58
  4. Step 4: Simplify right side
    8,620.11x = 35,914,567.70
  5. Step 5: Solve for x
    x = 35,914,567.70/8,620.11
  6. Step 6: Final answer
    x = 4,166.37

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1.5x scale

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.