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Finding the Fourth Proportional to 8,695.80, 13,043.90 and 2,122.11

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Solution

The fourth proportional to 8,695.80, 13,043.90 and 2,122.11 is: 3,183.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,695.80 : 13,043.90 = 2,122.11 : x
  2. Step 2: Convert to fraction form
    8,695.80/13,043.90 = 2,122.11/x
  3. Step 3: Cross multiply
    8,695.80x = 13,043.90 × 2,122.11
  4. Step 4: Simplify right side
    8,695.80x = 27,680,595.93
  5. Step 5: Solve for x
    x = 27,680,595.93/8,695.80
  6. Step 6: Final answer
    x = 3,183.21

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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.