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Finding the Third Proportional to 7,290 and 11,223

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Solution

The third proportional to 7,290 and 11,223 is: 17,277.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,290 : 11,223 = 11,223 : x
  2. Step 2: Convert to fraction form
    7,290/11,223 = 11,223/x
  3. Step 3: Cross multiply
    7,290x = 11,223 × 11,223
  4. Step 4: Simplify right side
    7,290x = 125,955,729
  5. Step 5: Solve for x
    x = 125,955,729/7,290
  6. Step 6: Final answer
    x = 17,277.88

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.