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Finding the Third Proportional to 13,130 and 19,689

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Solution

The third proportional to 13,130 and 19,689 is: 29,524.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130 : 19,689 = 19,689 : x
  2. Step 2: Convert to fraction form
    13,130/19,689 = 19,689/x
  3. Step 3: Cross multiply
    13,130x = 19,689 × 19,689
  4. Step 4: Simplify right side
    13,130x = 387,656,721
  5. Step 5: Solve for x
    x = 387,656,721/13,130
  6. Step 6: Final answer
    x = 29,524.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.