4/12 = 6/n
3 answers
To solve the proportion \( \frac{4}{12} = \frac{6}{n} \), we can use cross multiplication.
Cross multiplying gives us: \[ 4n = 12 \times 6 \]
Calculating \( 12 \times 6 \): \[ 12 \times 6 = 72 \]
So we have: \[ 4n = 72 \]
To solve for \( n \), divide both sides by 4: \[ n = \frac{72}{4} = 18 \]
Thus, the missing number \( n \) is: \[ \boxed{18} \]
To solve the proportion \( \frac{8}{15} = \frac{12}{a} \), we can use cross multiplication.
Cross multiplying gives us: \[ 8a = 15 \times 12 \]
Calculating \( 15 \times 12 \): \[ 15 \times 12 = 180 \]
Now we have: \[ 8a = 180 \]
To solve for \( a \), divide both sides by 8: \[ a = \frac{180}{8} \]
Simplifying \( \frac{180}{8} \): \[ a = 22.5 \]
Thus, the missing number \( a \) is: \[ \boxed{22.5} \]
