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Finding the Third Proportional to 21,316 and 33,728

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Solution

The third proportional to 21,316 and 33,728 is: 53,367.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,316 : 33,728 = 33,728 : x
  2. Step 2: Convert to fraction form
    21,316/33,728 = 33,728/x
  3. Step 3: Cross multiply
    21,316x = 33,728 × 33,728
  4. Step 4: Simplify right side
    21,316x = 1,137,577,984
  5. Step 5: Solve for x
    x = 1,137,577,984/21,316
  6. Step 6: Final answer
    x = 53,367.33

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.