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Finding the Fourth Proportional to 8,961.45, 13,440.38 and 8,516.88

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Solution

The fourth proportional to 8,961.45, 13,440.38 and 8,516.88 is: 12,773.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,961.45 : 13,440.38 = 8,516.88 : x
  2. Step 2: Convert to fraction form
    8,961.45/13,440.38 = 8,516.88/x
  3. Step 3: Cross multiply
    8,961.45x = 13,440.38 × 8,516.88
  4. Step 4: Simplify right side
    8,961.45x = 114,470,061.03
  5. Step 5: Solve for x
    x = 114,470,061.03/8,961.45
  6. Step 6: Final answer
    x = 12,773.61

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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.