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Finding the Third Proportional to 7,990 and 14,215

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Solution

The third proportional to 7,990 and 14,215 is: 25,289.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990 : 14,215 = 14,215 : x
  2. Step 2: Convert to fraction form
    7,990/14,215 = 14,215/x
  3. Step 3: Cross multiply
    7,990x = 14,215 × 14,215
  4. Step 4: Simplify right side
    7,990x = 202,066,225
  5. Step 5: Solve for x
    x = 202,066,225/7,990
  6. Step 6: Final answer
    x = 25,289.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.