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Finding the Third Proportional to 11,398.50 and 15,615

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Solution

The third proportional to 11,398.50 and 15,615 is: 21,391.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,398.50 : 15,615 = 15,615 : x
  2. Step 2: Convert to fraction form
    11,398.50/15,615 = 15,615/x
  3. Step 3: Cross multiply
    11,398.50x = 15,615 × 15,615
  4. Step 4: Simplify right side
    11,398.50x = 243,828,225
  5. Step 5: Solve for x
    x = 243,828,225/11,398.50
  6. Step 6: Final answer
    x = 21,391.26

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.