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Finding the Fourth Proportional to 8,518.85, 12,761.86 and 6,960.61

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Solution

The fourth proportional to 8,518.85, 12,761.86 and 6,960.61 is: 10,427.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,518.85 : 12,761.86 = 6,960.61 : x
  2. Step 2: Convert to fraction form
    8,518.85/12,761.86 = 6,960.61/x
  3. Step 3: Cross multiply
    8,518.85x = 12,761.86 × 6,960.61
  4. Step 4: Simplify right side
    8,518.85x = 88,830,330.33
  5. Step 5: Solve for x
    x = 88,830,330.33/8,518.85
  6. Step 6: Final answer
    x = 10,427.50

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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.