Home / 2,815.21-4,225.53-2,082.56

Finding the Fourth Proportional to 2,815.21, 4,225.53 and 2,082.56

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Solution

The fourth proportional to 2,815.21, 4,225.53 and 2,082.56 is: 3,125.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.21 : 4,225.53 = 2,082.56 : x
  2. Step 2: Convert to fraction form
    2,815.21/4,225.53 = 2,082.56/x
  3. Step 3: Cross multiply
    2,815.21x = 4,225.53 × 2,082.56
  4. Step 4: Simplify right side
    2,815.21x = 8,799,919.76
  5. Step 5: Solve for x
    x = 8,799,919.76/2,815.21
  6. Step 6: Final answer
    x = 3,125.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.