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Finding the Fourth Proportional to 8,601.60, 11,860.74 and 5,611.80

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Solution

The fourth proportional to 8,601.60, 11,860.74 and 5,611.80 is: 7,738.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,601.60 : 11,860.74 = 5,611.80 : x
  2. Step 2: Convert to fraction form
    8,601.60/11,860.74 = 5,611.80/x
  3. Step 3: Cross multiply
    8,601.60x = 11,860.74 × 5,611.80
  4. Step 4: Simplify right side
    8,601.60x = 66,560,100.73
  5. Step 5: Solve for x
    x = 66,560,100.73/8,601.60
  6. Step 6: Final answer
    x = 7,738.11

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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.