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Finding the Third Proportional to 13,989 and 21,348

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Solution

The third proportional to 13,989 and 21,348 is: 32,578.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,989 : 21,348 = 21,348 : x
  2. Step 2: Convert to fraction form
    13,989/21,348 = 21,348/x
  3. Step 3: Cross multiply
    13,989x = 21,348 × 21,348
  4. Step 4: Simplify right side
    13,989x = 455,737,104
  5. Step 5: Solve for x
    x = 455,737,104/13,989
  6. Step 6: Final answer
    x = 32,578.25

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.