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Finding the Third Proportional to 20,939,391 and 31,431,243

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Solution

The third proportional to 20,939,391 and 31,431,243 is: 47,180,122.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939,391 : 31,431,243 = 31,431,243 : x
  2. Step 2: Convert to fraction form
    20,939,391/31,431,243 = 31,431,243/x
  3. Step 3: Cross multiply
    20,939,391x = 31,431,243 × 31,431,243
  4. Step 4: Simplify right side
    20,939,391x = 987,923,036,525,049
  5. Step 5: Solve for x
    x = 987,923,036,525,049/20,939,391
  6. Step 6: Final answer
    x = 47,180,122.69

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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.