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Finding the Third Proportional to 15,788 and 19,172

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Solution

The third proportional to 15,788 and 19,172 is: 23,281.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,788 : 19,172 = 19,172 : x
  2. Step 2: Convert to fraction form
    15,788/19,172 = 19,172/x
  3. Step 3: Cross multiply
    15,788x = 19,172 × 19,172
  4. Step 4: Simplify right side
    15,788x = 367,565,584
  5. Step 5: Solve for x
    x = 367,565,584/15,788
  6. Step 6: Final answer
    x = 23,281.33

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Why These Related Problems?

These problems maintain the same ratio (1.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.