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Finding the Third Proportional to 13,830 and 21,450

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Solution

The third proportional to 13,830 and 21,450 is: 33,268.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,830 : 21,450 = 21,450 : x
  2. Step 2: Convert to fraction form
    13,830/21,450 = 21,450/x
  3. Step 3: Cross multiply
    13,830x = 21,450 × 21,450
  4. Step 4: Simplify right side
    13,830x = 460,102,500
  5. Step 5: Solve for x
    x = 460,102,500/13,830
  6. Step 6: Final answer
    x = 33,268.44

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.