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Finding the Third Proportional to 11,712 and 20,724

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Solution

The third proportional to 11,712 and 20,724 is: 36,670.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,712 : 20,724 = 20,724 : x
  2. Step 2: Convert to fraction form
    11,712/20,724 = 20,724/x
  3. Step 3: Cross multiply
    11,712x = 20,724 × 20,724
  4. Step 4: Simplify right side
    11,712x = 429,484,176
  5. Step 5: Solve for x
    x = 429,484,176/11,712
  6. Step 6: Final answer
    x = 36,670.44

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Why These Related Problems?

These problems maintain the same ratio (1.77) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.