Home / 8,540.20-12,811.62-3,609.40

Finding the Fourth Proportional to 8,540.20, 12,811.62 and 3,609.40

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Solution

The fourth proportional to 8,540.20, 12,811.62 and 3,609.40 is: 5,414.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,540.20 : 12,811.62 = 3,609.40 : x
  2. Step 2: Convert to fraction form
    8,540.20/12,811.62 = 3,609.40/x
  3. Step 3: Cross multiply
    8,540.20x = 12,811.62 × 3,609.40
  4. Step 4: Simplify right side
    8,540.20x = 46,242,261.23
  5. Step 5: Solve for x
    x = 46,242,261.23/8,540.20
  6. Step 6: Final answer
    x = 5,414.66

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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.