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Finding the Fourth Proportional to 12,217.88, 16,861.88 and 8,817.70

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Solution

The fourth proportional to 12,217.88, 16,861.88 and 8,817.70 is: 12,169.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,217.88 : 16,861.88 = 8,817.70 : x
  2. Step 2: Convert to fraction form
    12,217.88/16,861.88 = 8,817.70/x
  3. Step 3: Cross multiply
    12,217.88x = 16,861.88 × 8,817.70
  4. Step 4: Simplify right side
    12,217.88x = 148,682,999.28
  5. Step 5: Solve for x
    x = 148,682,999.28/12,217.88
  6. Step 6: Final answer
    x = 12,169.30

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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.