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Finding the Third Proportional to 19,551 and 31,480

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Solution

The third proportional to 19,551 and 31,480 is: 50,687.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,551 : 31,480 = 31,480 : x
  2. Step 2: Convert to fraction form
    19,551/31,480 = 31,480/x
  3. Step 3: Cross multiply
    19,551x = 31,480 × 31,480
  4. Step 4: Simplify right side
    19,551x = 990,990,400
  5. Step 5: Solve for x
    x = 990,990,400/19,551
  6. Step 6: Final answer
    x = 50,687.45

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.