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Finding the Fourth Proportional to 12,633.88, 18,951.78 and 3,869.44

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Solution

The fourth proportional to 12,633.88, 18,951.78 and 3,869.44 is: 5,804.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,633.88 : 18,951.78 = 3,869.44 : x
  2. Step 2: Convert to fraction form
    12,633.88/18,951.78 = 3,869.44/x
  3. Step 3: Cross multiply
    12,633.88x = 18,951.78 × 3,869.44
  4. Step 4: Simplify right side
    12,633.88x = 73,332,775.60
  5. Step 5: Solve for x
    x = 73,332,775.60/12,633.88
  6. Step 6: Final answer
    x = 5,804.45

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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.