Home / 6,920.12-10,379.84-3,806.21

Finding the Fourth Proportional to 6,920.12, 10,379.84 and 3,806.21

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Solution

The fourth proportional to 6,920.12, 10,379.84 and 3,806.21 is: 5,709.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,920.12 : 10,379.84 = 3,806.21 : x
  2. Step 2: Convert to fraction form
    6,920.12/10,379.84 = 3,806.21/x
  3. Step 3: Cross multiply
    6,920.12x = 10,379.84 × 3,806.21
  4. Step 4: Simplify right side
    6,920.12x = 39,507,779.88
  5. Step 5: Solve for x
    x = 39,507,779.88/6,920.12
  6. Step 6: Final answer
    x = 5,709.12

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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.