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Finding the Fourth Proportional to 12,209.94, 18,315.11 and 3,890.03

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Solution

The fourth proportional to 12,209.94, 18,315.11 and 3,890.03 is: 5,835.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,209.94 : 18,315.11 = 3,890.03 : x
  2. Step 2: Convert to fraction form
    12,209.94/18,315.11 = 3,890.03/x
  3. Step 3: Cross multiply
    12,209.94x = 18,315.11 × 3,890.03
  4. Step 4: Simplify right side
    12,209.94x = 71,246,245.50
  5. Step 5: Solve for x
    x = 71,246,245.50/12,209.94
  6. Step 6: Final answer
    x = 5,835.10

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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.