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Finding the Third Proportional to 8,988 and 21,156

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Solution

The third proportional to 8,988 and 21,156 is: 49,797.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,988 : 21,156 = 21,156 : x
  2. Step 2: Convert to fraction form
    8,988/21,156 = 21,156/x
  3. Step 3: Cross multiply
    8,988x = 21,156 × 21,156
  4. Step 4: Simplify right side
    8,988x = 447,576,336
  5. Step 5: Solve for x
    x = 447,576,336/8,988
  6. Step 6: Final answer
    x = 49,797.10

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Why These Related Problems?

These problems maintain the same ratio (2.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.