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Finding the Third Proportional to 4,218 and 9,072

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Solution

The third proportional to 4,218 and 9,072 is: 19,511.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,218 : 9,072 = 9,072 : x
  2. Step 2: Convert to fraction form
    4,218/9,072 = 9,072/x
  3. Step 3: Cross multiply
    4,218x = 9,072 × 9,072
  4. Step 4: Simplify right side
    4,218x = 82,301,184
  5. Step 5: Solve for x
    x = 82,301,184/4,218
  6. Step 6: Final answer
    x = 19,511.90

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.