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Finding the Fourth Proportional to 26,611.75, 39,917.64 and 8,143.75

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Solution

The fourth proportional to 26,611.75, 39,917.64 and 8,143.75 is: 12,215.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,611.75 : 39,917.64 = 8,143.75 : x
  2. Step 2: Convert to fraction form
    26,611.75/39,917.64 = 8,143.75/x
  3. Step 3: Cross multiply
    26,611.75x = 39,917.64 × 8,143.75
  4. Step 4: Simplify right side
    26,611.75x = 325,079,280.75
  5. Step 5: Solve for x
    x = 325,079,280.75/26,611.75
  6. Step 6: Final answer
    x = 12,215.63

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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.