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Finding the Third Proportional to 13,455 and 20,908.50

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Solution

The third proportional to 13,455 and 20,908.50 is: 32,490.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,455 : 20,908.50 = 20,908.50 : x
  2. Step 2: Convert to fraction form
    13,455/20,908.50 = 20,908.50/x
  3. Step 3: Cross multiply
    13,455x = 20,908.50 × 20,908.50
  4. Step 4: Simplify right side
    13,455x = 437,165,372.25
  5. Step 5: Solve for x
    x = 437,165,372.25/13,455
  6. Step 6: Final answer
    x = 32,490.92

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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.