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Finding the Fourth Proportional to 12,679.67, 17,479.38 and 8,891.41

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Solution

The fourth proportional to 12,679.67, 17,479.38 and 8,891.41 is: 12,257.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.67 : 17,479.38 = 8,891.41 : x
  2. Step 2: Convert to fraction form
    12,679.67/17,479.38 = 8,891.41/x
  3. Step 3: Cross multiply
    12,679.67x = 17,479.38 × 8,891.41
  4. Step 4: Simplify right side
    12,679.67x = 155,416,334.13
  5. Step 5: Solve for x
    x = 155,416,334.13/12,679.67
  6. Step 6: Final answer
    x = 12,257.13

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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.