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Finding the Third Proportional to 15,437 and 21,858

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Solution

The third proportional to 15,437 and 21,858 is: 30,949.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,437 : 21,858 = 21,858 : x
  2. Step 2: Convert to fraction form
    15,437/21,858 = 21,858/x
  3. Step 3: Cross multiply
    15,437x = 21,858 × 21,858
  4. Step 4: Simplify right side
    15,437x = 477,772,164
  5. Step 5: Solve for x
    x = 477,772,164/15,437
  6. Step 6: Final answer
    x = 30,949.81

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.