
constantin958
So look:
The length of the original is 15 feet, / this is 4.57 m = 457 cm.
You need a scale of 1:12 / this is 457 cm:12 = 38.08 cm.
My model is 33.5 cm, so to 38.08 cm you need to increase it by 4.58 cm or 113.67%.
I hope you know how to scale. Good luck my friend.