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Finding the Fourth Proportional to 11,786.58, 17,679.95 and 5,611.86

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Solution

The fourth proportional to 11,786.58, 17,679.95 and 5,611.86 is: 8,417.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,786.58 : 17,679.95 = 5,611.86 : x
  2. Step 2: Convert to fraction form
    11,786.58/17,679.95 = 5,611.86/x
  3. Step 3: Cross multiply
    11,786.58x = 17,679.95 × 5,611.86
  4. Step 4: Simplify right side
    11,786.58x = 99,217,404.21
  5. Step 5: Solve for x
    x = 99,217,404.21/11,786.58
  6. Step 6: Final answer
    x = 8,417.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.