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Finding the Third Proportional to 21,122 and 28,803

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Solution

The third proportional to 21,122 and 28,803 is: 39,277.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122 : 28,803 = 28,803 : x
  2. Step 2: Convert to fraction form
    21,122/28,803 = 28,803/x
  3. Step 3: Cross multiply
    21,122x = 28,803 × 28,803
  4. Step 4: Simplify right side
    21,122x = 829,612,809
  5. Step 5: Solve for x
    x = 829,612,809/21,122
  6. Step 6: Final answer
    x = 39,277.19

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.