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Finding the Third Proportional to 21,190 and 31,136

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Solution

The third proportional to 21,190 and 31,136 is: 45,750.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190 : 31,136 = 31,136 : x
  2. Step 2: Convert to fraction form
    21,190/31,136 = 31,136/x
  3. Step 3: Cross multiply
    21,190x = 31,136 × 31,136
  4. Step 4: Simplify right side
    21,190x = 969,450,496
  5. Step 5: Solve for x
    x = 969,450,496/21,190
  6. Step 6: Final answer
    x = 45,750.38

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.