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Finding the Third Proportional to 10,520 and 19,420

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Solution

The third proportional to 10,520 and 19,420 is: 35,849.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,520 : 19,420 = 19,420 : x
  2. Step 2: Convert to fraction form
    10,520/19,420 = 19,420/x
  3. Step 3: Cross multiply
    10,520x = 19,420 × 19,420
  4. Step 4: Simplify right side
    10,520x = 377,136,400
  5. Step 5: Solve for x
    x = 377,136,400/10,520
  6. Step 6: Final answer
    x = 35,849.47

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Why These Related Problems?

These problems maintain the same ratio (1.85) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.