A survey of total project construction costs for a wide range of buildings (hospitals, schools, banks, nursing homes, etc.) in 2006 found that the average cost was $13,136,431. The mechanical and electri­cal portions of that cost were $2,511,893 and $1,585,384, respectively. If the total project cost in 2017 increases to $15,700,000, what would the me­chanical portion of the total cost equal, provided the percentage (a) remained the same as in 2006, and (b) increased by 20% from the 2006 portion?

What will be an ideal response?


Mechanical % in 2006: 2,511,893/13,136,431 = 0.1912 ( 19.12%)

(a) Mechanical cost in 2015: 15,700,000(0.1912) = $3,001,840

(b) Mechanical cost in 2015: 15,700,000(0.1912)(1.20) = $3,602,208

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