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Finding the Fourth Proportional to 7,863.15, 11,781.15 and 5,518.69

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Solution

The fourth proportional to 7,863.15, 11,781.15 and 5,518.69 is: 8,268.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,863.15 : 11,781.15 = 5,518.69 : x
  2. Step 2: Convert to fraction form
    7,863.15/11,781.15 = 5,518.69/x
  3. Step 3: Cross multiply
    7,863.15x = 11,781.15 × 5,518.69
  4. Step 4: Simplify right side
    7,863.15x = 65,016,514.69
  5. Step 5: Solve for x
    x = 65,016,514.69/7,863.15
  6. Step 6: Final answer
    x = 8,268.51

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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.