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Finding the Third Proportional to 15,858 and 18,270

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Solution

The third proportional to 15,858 and 18,270 is: 21,048.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,858 : 18,270 = 18,270 : x
  2. Step 2: Convert to fraction form
    15,858/18,270 = 18,270/x
  3. Step 3: Cross multiply
    15,858x = 18,270 × 18,270
  4. Step 4: Simplify right side
    15,858x = 333,792,900
  5. Step 5: Solve for x
    x = 333,792,900/15,858
  6. Step 6: Final answer
    x = 21,048.86

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.