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Finding the Third Proportional to 15,904 and 21,108

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Solution

The third proportional to 15,904 and 21,108 is: 28,014.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,904 : 21,108 = 21,108 : x
  2. Step 2: Convert to fraction form
    15,904/21,108 = 21,108/x
  3. Step 3: Cross multiply
    15,904x = 21,108 × 21,108
  4. Step 4: Simplify right side
    15,904x = 445,547,664
  5. Step 5: Solve for x
    x = 445,547,664/15,904
  6. Step 6: Final answer
    x = 28,014.82

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.