Home / 6,511.55-8,986.83-3,993.21

Finding the Fourth Proportional to 6,511.55, 8,986.83 and 3,993.21

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Solution

The fourth proportional to 6,511.55, 8,986.83 and 3,993.21 is: 5,511.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,511.55 : 8,986.83 = 3,993.21 : x
  2. Step 2: Convert to fraction form
    6,511.55/8,986.83 = 3,993.21/x
  3. Step 3: Cross multiply
    6,511.55x = 8,986.83 × 3,993.21
  4. Step 4: Simplify right side
    6,511.55x = 35,886,299.42
  5. Step 5: Solve for x
    x = 35,886,299.42/6,511.55
  6. Step 6: Final answer
    x = 5,511.18

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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.