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Finding the Third Proportional to 9,769 and 21,389

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Solution

The third proportional to 9,769 and 21,389 is: 46,830.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,769 : 21,389 = 21,389 : x
  2. Step 2: Convert to fraction form
    9,769/21,389 = 21,389/x
  3. Step 3: Cross multiply
    9,769x = 21,389 × 21,389
  4. Step 4: Simplify right side
    9,769x = 457,489,321
  5. Step 5: Solve for x
    x = 457,489,321/9,769
  6. Step 6: Final answer
    x = 46,830.72

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.