Question 233343: The amount of gold jewelry and other products is measured in karats (K), where 24K represents pure gold. The mark 14K on a chain indicates that the ratio between the mass of the gold in the chain and the mass of the chain is 14:24. If a gold ring is marked 18K and it weighs 0.4 oz, what is the value of the gold in the ring if pure gold is valued at $300 per oz?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! The amount of gold jewelry and other products is measured in karats (K), where 24K represents pure gold.
The mark 14K on a chain indicates that the ratio between the mass of the gold in the chain and the mass of the chain is 14:24.
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If a gold ring is marked 18K and it weighs 0.4 oz, what is the value of the gold in the ring if pure gold is valued at $300 per oz?
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Proportion:
18/24 = x/0.4
x = 0.4(18/24)
x = 0.4(3/4)
x = (3/4)(4/10) = 3/10 = 0.3 oz (this is the amount of gold in the ring)
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Cheers,
Stan H.
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