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Finding the Third Proportional to 15,640 and 19,824

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Solution

The third proportional to 15,640 and 19,824 is: 25,127.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,640 : 19,824 = 19,824 : x
  2. Step 2: Convert to fraction form
    15,640/19,824 = 19,824/x
  3. Step 3: Cross multiply
    15,640x = 19,824 × 19,824
  4. Step 4: Simplify right side
    15,640x = 392,990,976
  5. Step 5: Solve for x
    x = 392,990,976/15,640
  6. Step 6: Final answer
    x = 25,127.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.