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Finding the Third Proportional to 15,678 and 19,827

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Solution

The third proportional to 15,678 and 19,827 is: 25,073.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,678 : 19,827 = 19,827 : x
  2. Step 2: Convert to fraction form
    15,678/19,827 = 19,827/x
  3. Step 3: Cross multiply
    15,678x = 19,827 × 19,827
  4. Step 4: Simplify right side
    15,678x = 393,109,929
  5. Step 5: Solve for x
    x = 393,109,929/15,678
  6. Step 6: Final answer
    x = 25,073.98

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Why These Related Problems?

These problems maintain the same ratio (1.26) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.