Fundamental frecuency of a wineglass

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I tried myself the corkscrewing experiment using my wineglass (photo attached) and I got the following results:

mode....frequency,Hz  f/f(2,0)  "theoretical"
(2,0).....1300              1            1
(3,0)      2777              2.14        1.5² = 2.25
(4,0)      4934              3.78        2²    = 4
(5,0)      7617              5.86        2.5²  = 6.25
(6,0)      10711            8.24        3²    = 9