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Finding the Fourth Proportional to 8,961.22, 12,360.36 and 8,217.64

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Solution

The fourth proportional to 8,961.22, 12,360.36 and 8,217.64 is: 11,334.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,961.22 : 12,360.36 = 8,217.64 : x
  2. Step 2: Convert to fraction form
    8,961.22/12,360.36 = 8,217.64/x
  3. Step 3: Cross multiply
    8,961.22x = 12,360.36 × 8,217.64
  4. Step 4: Simplify right side
    8,961.22x = 101,572,988.75
  5. Step 5: Solve for x
    x = 101,572,988.75/8,961.22
  6. Step 6: Final answer
    x = 11,334.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.