swept boss base question

hi, i am new to the forum and this is my first question to the experts in here. Please help me, I am looking at a bike stand i see from a wallpaper and i am wondering how it is modeled. My thought is that it is swept. I did the same way but i dont get the taper look as shown from the bike image you see here. Please look at the two images and show me how it is done.

Thanks!

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