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Finding the Fourth Proportional to 8,961.64, 13,440.66 and 8,517.07

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Solution

The fourth proportional to 8,961.64, 13,440.66 and 8,517.07 is: 12,773.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,961.64 : 13,440.66 = 8,517.07 : x
  2. Step 2: Convert to fraction form
    8,961.64/13,440.66 = 8,517.07/x
  3. Step 3: Cross multiply
    8,961.64x = 13,440.66 × 8,517.07
  4. Step 4: Simplify right side
    8,961.64x = 114,475,042.07
  5. Step 5: Solve for x
    x = 114,475,042.07/8,961.64
  6. Step 6: Final answer
    x = 12,773.89

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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.