Fourfold in a sentence as an adjective

Hard drive capacities have increased far more than fourfold in that 10 years, though.

About the same time I saw in Forskning & Framsteg that the group rape statistics has increased fourfold since the 1990s.

Fourfold in a sentence as an adverb

GDP from the manufacturing sector has increased fourfold since 1950.

He found the ionization rate increased approximately fourfold over the rate at ground level.

Fourfold definitions

adjective

four times as great or many; "a fourfold increase in the dosage"

See also: quadruple four-fold

adjective

having four units or components; "quadruple rhythm has four beats per measure"; "quadruplex wire"

See also: quadruple quadruplicate quadruplex four-fold

adverb

by a factor of four; "the price of gasoline has increased fourfold over the past two years"