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Finding the Third Proportional to 13,376 and 21,178

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Solution

The third proportional to 13,376 and 21,178 is: 33,530.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,376 : 21,178 = 21,178 : x
  2. Step 2: Convert to fraction form
    13,376/21,178 = 21,178/x
  3. Step 3: Cross multiply
    13,376x = 21,178 × 21,178
  4. Step 4: Simplify right side
    13,376x = 448,507,684
  5. Step 5: Solve for x
    x = 448,507,684/13,376
  6. Step 6: Final answer
    x = 33,530.78

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.