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Finding the Third Proportional to 13,212 and 15,660

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Solution

The third proportional to 13,212 and 15,660 is: 18,561.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,212 : 15,660 = 15,660 : x
  2. Step 2: Convert to fraction form
    13,212/15,660 = 15,660/x
  3. Step 3: Cross multiply
    13,212x = 15,660 × 15,660
  4. Step 4: Simplify right side
    13,212x = 245,235,600
  5. Step 5: Solve for x
    x = 245,235,600/13,212
  6. Step 6: Final answer
    x = 18,561.58

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Why These Related Problems?

These problems maintain the same ratio (1.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.