Home / 12,429.70-18,644.55-3,664.60

Finding the Fourth Proportional to 12,429.70, 18,644.55 and 3,664.60

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Solution

The fourth proportional to 12,429.70, 18,644.55 and 3,664.60 is: 5,496.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,429.70 : 18,644.55 = 3,664.60 : x
  2. Step 2: Convert to fraction form
    12,429.70/18,644.55 = 3,664.60/x
  3. Step 3: Cross multiply
    12,429.70x = 18,644.55 × 3,664.60
  4. Step 4: Simplify right side
    12,429.70x = 68,324,817.93
  5. Step 5: Solve for x
    x = 68,324,817.93/12,429.70
  6. Step 6: Final answer
    x = 5,496.90

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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.