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Finding the Fourth Proportional to 11,806.50, 16,310.88 and 8,817.18

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Solution

The fourth proportional to 11,806.50, 16,310.88 and 8,817.18 is: 12,181.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,806.50 : 16,310.88 = 8,817.18 : x
  2. Step 2: Convert to fraction form
    11,806.50/16,310.88 = 8,817.18/x
  3. Step 3: Cross multiply
    11,806.50x = 16,310.88 × 8,817.18
  4. Step 4: Simplify right side
    11,806.50x = 143,815,964.92
  5. Step 5: Solve for x
    x = 143,815,964.92/11,806.50
  6. Step 6: Final answer
    x = 12,181.08

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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.