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Finding the Third Proportional to 21,020 and 43,000

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Solution

The third proportional to 21,020 and 43,000 is: 87,963.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,020 : 43,000 = 43,000 : x
  2. Step 2: Convert to fraction form
    21,020/43,000 = 43,000/x
  3. Step 3: Cross multiply
    21,020x = 43,000 × 43,000
  4. Step 4: Simplify right side
    21,020x = 1,849,000,000
  5. Step 5: Solve for x
    x = 1,849,000,000/21,020
  6. Step 6: Final answer
    x = 87,963.84

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.