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Finding the Third Proportional to 13,970 and 20,955

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Solution

The third proportional to 13,970 and 20,955 is: 31,432.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,970 : 20,955 = 20,955 : x
  2. Step 2: Convert to fraction form
    13,970/20,955 = 20,955/x
  3. Step 3: Cross multiply
    13,970x = 20,955 × 20,955
  4. Step 4: Simplify right side
    13,970x = 439,112,025
  5. Step 5: Solve for x
    x = 439,112,025/13,970
  6. Step 6: Final answer
    x = 31,432.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.