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Finding the Third Proportional to 21,636 and 31,603

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Solution

The third proportional to 21,636 and 31,603 is: 46,161.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,636 : 31,603 = 31,603 : x
  2. Step 2: Convert to fraction form
    21,636/31,603 = 31,603/x
  3. Step 3: Cross multiply
    21,636x = 31,603 × 31,603
  4. Step 4: Simplify right side
    21,636x = 998,749,609
  5. Step 5: Solve for x
    x = 998,749,609/21,636
  6. Step 6: Final answer
    x = 46,161.47

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.