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Finding the Fourth Proportional to 29,108, 40,172.28 and 17,930

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Solution

The fourth proportional to 29,108, 40,172.28 and 17,930 is: 24,745.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,108 : 40,172.28 = 17,930 : x
  2. Step 2: Convert to fraction form
    29,108/40,172.28 = 17,930/x
  3. Step 3: Cross multiply
    29,108x = 40,172.28 × 17,930
  4. Step 4: Simplify right side
    29,108x = 720,288,980.40
  5. Step 5: Solve for x
    x = 720,288,980.40/29,108
  6. Step 6: Final answer
    x = 24,745.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.