Home / 3,121.28-4,307.30-2,057.76

Finding the Fourth Proportional to 3,121.28, 4,307.30 and 2,057.76

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Solution

The fourth proportional to 3,121.28, 4,307.30 and 2,057.76 is: 2,839.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.28 : 4,307.30 = 2,057.76 : x
  2. Step 2: Convert to fraction form
    3,121.28/4,307.30 = 2,057.76/x
  3. Step 3: Cross multiply
    3,121.28x = 4,307.30 × 2,057.76
  4. Step 4: Simplify right side
    3,121.28x = 8,863,389.65
  5. Step 5: Solve for x
    x = 8,863,389.65/3,121.28
  6. Step 6: Final answer
    x = 2,839.67

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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.