My 14months old baby not walking alone.

My daughter is 14 months old and weighs 9.4kgs(birth weight is. 3.3kgs).my concern is that she has not started to walk alone till now. She began crawling when she was 10 months old. And now she crawls faster and with the support of holding chair sofa and cupboards she walks here and there but not without support. Even when I support her walking by holding hands, she walks 10 to 15 steps and sits down. She is still on breastfeed. Eats solids well and a happy playing kid. Communicates good. Responds on calling. When will she start walking alone? Is this something to be worried of? Or should I consult a pediatrician.? Does she need some extra supplements? Please suggest My baby is bit tall than her age grp. So people tell me taller babies take time to walk. Is that true?