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Finding the Third Proportional to 7,218 and 7,818

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Solution

The third proportional to 7,218 and 7,818 is: 8,467.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,218 : 7,818 = 7,818 : x
  2. Step 2: Convert to fraction form
    7,218/7,818 = 7,818/x
  3. Step 3: Cross multiply
    7,218x = 7,818 × 7,818
  4. Step 4: Simplify right side
    7,218x = 61,121,124
  5. Step 5: Solve for x
    x = 61,121,124/7,218
  6. Step 6: Final answer
    x = 8,467.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.