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Finding the Fourth Proportional to 12,611.52, 18,917.28 and 3,846.48

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Solution

The fourth proportional to 12,611.52, 18,917.28 and 3,846.48 is: 5,769.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,611.52 : 18,917.28 = 3,846.48 : x
  2. Step 2: Convert to fraction form
    12,611.52/18,917.28 = 3,846.48/x
  3. Step 3: Cross multiply
    12,611.52x = 18,917.28 × 3,846.48
  4. Step 4: Simplify right side
    12,611.52x = 72,764,939.17
  5. Step 5: Solve for x
    x = 72,764,939.17/12,611.52
  6. Step 6: Final answer
    x = 5,769.72

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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.