Pregunta
Solución de inteligencia artificial de Upstudy
Respuesta verificada por el tutor
Responder
\( x = 7 \)
Solución
Per risolvere la proporzione \( 18 : x = 54 : 21 \), seguiamo i seguenti passaggi:
1. **Impostare l'equazione della proporzione:**
\[
\frac{18}{x} = \frac{54}{21}
\]
2. **Effettuare il prodotto incrociato:**
\[
18 \times 21 = 54 \times x
\]
3. **Calcolare il prodotto a sinistra:**
\[
378 = 54x
\]
4. **Isolare la variabile \( x \) dividendo entrambi i lati per 54:**
\[
x = \frac{378}{54}
\]
5. **Semplificare la frazione:**
\[
x = 7
\]
**Risultato finale:** \( x = 7 \)
Respondido por UpStudy AI y revisado por un tutor profesional
Como
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Bonus Knowledge
To solve for \(x\), you can use cross-multiplication. First, rewrite the proportion \( \frac{18}{x} = \frac{54}{21} \). Cross-multiply to get \( 18 \cdot 21 = 54 \cdot x \). This simplifies to \( 378 = 54x \). Now, divide both sides by 54 to find \(x\). That gives you \( x = \frac{378}{54} = 7 \). To verify your solution, you can plug \(x\) back into the original proportion: \( \frac{18}{7} \) should equal \( \frac{54}{21} \). Simplifying both fractions confirms they are indeed equal. So the final answer is \(x = 7\)!
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