Home / 13,855.26-20,779.92-3,992.70

Finding the Fourth Proportional to 13,855.26, 20,779.92 and 3,992.70

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Solution

The fourth proportional to 13,855.26, 20,779.92 and 3,992.70 is: 5,988.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,855.26 : 20,779.92 = 3,992.70 : x
  2. Step 2: Convert to fraction form
    13,855.26/20,779.92 = 3,992.70/x
  3. Step 3: Cross multiply
    13,855.26x = 20,779.92 × 3,992.70
  4. Step 4: Simplify right side
    13,855.26x = 82,967,986.58
  5. Step 5: Solve for x
    x = 82,967,986.58/13,855.26
  6. Step 6: Final answer
    x = 5,988.19

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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.