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Finding the Fourth Proportional to 8,911.73, 13,381.43 and 8,517.32

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Solution

The fourth proportional to 8,911.73, 13,381.43 and 8,517.32 is: 12,789.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,911.73 : 13,381.43 = 8,517.32 : x
  2. Step 2: Convert to fraction form
    8,911.73/13,381.43 = 8,517.32/x
  3. Step 3: Cross multiply
    8,911.73x = 13,381.43 × 8,517.32
  4. Step 4: Simplify right side
    8,911.73x = 113,973,862.05
  5. Step 5: Solve for x
    x = 113,973,862.05/8,911.73
  6. Step 6: Final answer
    x = 12,789.19

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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.