Home / 12,429.81-18,645.30-3,664.80

Finding the Fourth Proportional to 12,429.81, 18,645.30 and 3,664.80

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Solution

The fourth proportional to 12,429.81, 18,645.30 and 3,664.80 is: 5,497.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,429.81 : 18,645.30 = 3,664.80 : x
  2. Step 2: Convert to fraction form
    12,429.81/18,645.30 = 3,664.80/x
  3. Step 3: Cross multiply
    12,429.81x = 18,645.30 × 3,664.80
  4. Step 4: Simplify right side
    12,429.81x = 68,331,295.44
  5. Step 5: Solve for x
    x = 68,331,295.44/12,429.81
  6. Step 6: Final answer
    x = 5,497.37

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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.