Home / 5,240.87-7,861.23-2,120.82

Finding the Fourth Proportional to 5,240.87, 7,861.23 and 2,120.82

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Solution

The fourth proportional to 5,240.87, 7,861.23 and 2,120.82 is: 3,181.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,240.87 : 7,861.23 = 2,120.82 : x
  2. Step 2: Convert to fraction form
    5,240.87/7,861.23 = 2,120.82/x
  3. Step 3: Cross multiply
    5,240.87x = 7,861.23 × 2,120.82
  4. Step 4: Simplify right side
    5,240.87x = 16,672,253.81
  5. Step 5: Solve for x
    x = 16,672,253.81/5,240.87
  6. Step 6: Final answer
    x = 3,181.20

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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.