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Finding the Fourth Proportional to 20,404,939.30, 30,607,408.95 and 20,404,939.30

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Solution

The fourth proportional to 20,404,939.30, 30,607,408.95 and 20,404,939.30 is: 30,607,408.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,404,939.30 : 30,607,408.95 = 20,404,939.30 : x
  2. Step 2: Convert to fraction form
    20,404,939.30/30,607,408.95 = 20,404,939.30/x
  3. Step 3: Cross multiply
    20,404,939.30x = 30,607,408.95 × 20,404,939.30
  4. Step 4: Simplify right side
    20,404,939.30x = 624,542,321,755,026.75
  5. Step 5: Solve for x
    x = 624,542,321,755,026.75/20,404,939.30
  6. Step 6: Final answer
    x = 30,607,408.95

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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.