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Finding the Fourth Proportional to 12,603.38, 18,905.09 and 3,369.38

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Solution

The fourth proportional to 12,603.38, 18,905.09 and 3,369.38 is: 5,054.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,603.38 : 18,905.09 = 3,369.38 : x
  2. Step 2: Convert to fraction form
    12,603.38/18,905.09 = 3,369.38/x
  3. Step 3: Cross multiply
    12,603.38x = 18,905.09 × 3,369.38
  4. Step 4: Simplify right side
    12,603.38x = 63,698,320.77
  5. Step 5: Solve for x
    x = 63,698,320.77/12,603.38
  6. Step 6: Final answer
    x = 5,054.07

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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.