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Finding the Third Proportional to 11,653.50 and 15,387

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Solution

The third proportional to 11,653.50 and 15,387 is: 20,316.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,653.50 : 15,387 = 15,387 : x
  2. Step 2: Convert to fraction form
    11,653.50/15,387 = 15,387/x
  3. Step 3: Cross multiply
    11,653.50x = 15,387 × 15,387
  4. Step 4: Simplify right side
    11,653.50x = 236,759,769
  5. Step 5: Solve for x
    x = 236,759,769/11,653.50
  6. Step 6: Final answer
    x = 20,316.62

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.