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Finding the Fourth Proportional to 12,396.96, 17,115.84 and 8,618.88

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Solution

The fourth proportional to 12,396.96, 17,115.84 and 8,618.88 is: 11,899.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,396.96 : 17,115.84 = 8,618.88 : x
  2. Step 2: Convert to fraction form
    12,396.96/17,115.84 = 8,618.88/x
  3. Step 3: Cross multiply
    12,396.96x = 17,115.84 × 8,618.88
  4. Step 4: Simplify right side
    12,396.96x = 147,519,371.06
  5. Step 5: Solve for x
    x = 147,519,371.06/12,396.96
  6. Step 6: Final answer
    x = 11,899.64

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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.