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Finding the Third Proportional to 11,700 and 15,591

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Solution

The third proportional to 11,700 and 15,591 is: 20,776.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,700 : 15,591 = 15,591 : x
  2. Step 2: Convert to fraction form
    11,700/15,591 = 15,591/x
  3. Step 3: Cross multiply
    11,700x = 15,591 × 15,591
  4. Step 4: Simplify right side
    11,700x = 243,079,281
  5. Step 5: Solve for x
    x = 243,079,281/11,700
  6. Step 6: Final answer
    x = 20,776.01

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.