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Finding the Third Proportional to 2,391 and 5,173

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Solution

The third proportional to 2,391 and 5,173 is: 11,191.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,391 : 5,173 = 5,173 : x
  2. Step 2: Convert to fraction form
    2,391/5,173 = 5,173/x
  3. Step 3: Cross multiply
    2,391x = 5,173 × 5,173
  4. Step 4: Simplify right side
    2,391x = 26,759,929
  5. Step 5: Solve for x
    x = 26,759,929/2,391
  6. Step 6: Final answer
    x = 11,191.94

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.