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Finding the Third Proportional to 5,420 and 9,686

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Solution

The third proportional to 5,420 and 9,686 is: 17,309.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420 : 9,686 = 9,686 : x
  2. Step 2: Convert to fraction form
    5,420/9,686 = 9,686/x
  3. Step 3: Cross multiply
    5,420x = 9,686 × 9,686
  4. Step 4: Simplify right side
    5,420x = 93,818,596
  5. Step 5: Solve for x
    x = 93,818,596/5,420
  6. Step 6: Final answer
    x = 17,309.70

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Why These Related Problems?

These problems maintain the same ratio (1.79) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.