Women may make up half of the workforce, but it could be decades before they're on par with men on corporate boards.

FOX's Monica Rix explains:

We're all about girl power.

But when it comes to the board room, the number of ladies sitting at the table just isn't adding up. Right now, just over 15 percent of all director seats at publicly traded U.S. companies are held by women.

That's according to a new study by corporate research firm, Equilar. They say boards won't be evenly split between women and men until 2055. That's nearly 40 years!

Experts say one reason is there just aren't enough women working in the technology sector or the utility industry.

But that's changing and investors are now noticing. Companies with at least one female director tend to have higher stock returns and better corporate performance than those with all-male boards.

Monica Rix, FOX News.

Follow Monica Rix on Twitter: @MonicaRix