Home / 3,911-5,397.06-2,142.56

Finding the Fourth Proportional to 3,911, 5,397.06 and 2,142.56

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Solution

The fourth proportional to 3,911, 5,397.06 and 2,142.56 is: 2,956.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911 : 5,397.06 = 2,142.56 : x
  2. Step 2: Convert to fraction form
    3,911/5,397.06 = 2,142.56/x
  3. Step 3: Cross multiply
    3,911x = 5,397.06 × 2,142.56
  4. Step 4: Simplify right side
    3,911x = 11,563,524.87
  5. Step 5: Solve for x
    x = 11,563,524.87/3,911
  6. Step 6: Final answer
    x = 2,956.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.