Hi Rachel - you actually need to do some weight training if you are pear shaped and looking to change it, lots of cardio will just make you a smaller pear, not change your proportions.
You need dumbbells, not fixed machines
on a 4 week rotation try this (obviously i have never met you so this is at your own risk)
A decent weight, dont be afraid of using them.
week 1 - 2 x 12 reps
week 2 - 3 x 12reps
week 3 - 4 x 12 reps (you'll feel a bit bigger this week but it'll disppear again on week 4 when you end up smaller than before)
week 4 - 1 or 2 sets fairly light 12 reps to recover.
Use big compound exercises such as squats, lunges, deadlifts, press ups, squat and overhead press, lunges with rotation (holding a medicine ball out in front) bench press, flyes, and for your core use multi directions exercises sich as russian twists, plank, mountain climbers etc
Hope this help
I have a free downloadable ebook on this here but the link may get removed. Its not selling anything its just a freebie to help out you pear shaped ladies x
Jenni x www.itsallgonepearshaped.co.uk