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Finding the Third Proportional to 21,270 and 43,403

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Solution

The third proportional to 21,270 and 43,403 is: 88,567.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270 : 43,403 = 43,403 : x
  2. Step 2: Convert to fraction form
    21,270/43,403 = 43,403/x
  3. Step 3: Cross multiply
    21,270x = 43,403 × 43,403
  4. Step 4: Simplify right side
    21,270x = 1,883,820,409
  5. Step 5: Solve for x
    x = 1,883,820,409/21,270
  6. Step 6: Final answer
    x = 88,567.01

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.