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Finding the Third Proportional to 13,662 and 20,618

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Solution

The third proportional to 13,662 and 20,618 is: 31,115.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,662 : 20,618 = 20,618 : x
  2. Step 2: Convert to fraction form
    13,662/20,618 = 20,618/x
  3. Step 3: Cross multiply
    13,662x = 20,618 × 20,618
  4. Step 4: Simplify right side
    13,662x = 425,101,924
  5. Step 5: Solve for x
    x = 425,101,924/13,662
  6. Step 6: Final answer
    x = 31,115.64

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.