Home / 12,438.50-18,664.23-5,511.38

Finding the Fourth Proportional to 12,438.50, 18,664.23 and 5,511.38

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Solution

The fourth proportional to 12,438.50, 18,664.23 and 5,511.38 is: 8,269.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,438.50 : 18,664.23 = 5,511.38 : x
  2. Step 2: Convert to fraction form
    12,438.50/18,664.23 = 5,511.38/x
  3. Step 3: Cross multiply
    12,438.50x = 18,664.23 × 5,511.38
  4. Step 4: Simplify right side
    12,438.50x = 102,865,570.62
  5. Step 5: Solve for x
    x = 102,865,570.62/12,438.50
  6. Step 6: Final answer
    x = 8,269.94

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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.