Home / 20,819.63-31,231.37-6,779.09

Finding the Fourth Proportional to 20,819.63, 31,231.37 and 6,779.09

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Solution

The fourth proportional to 20,819.63, 31,231.37 and 6,779.09 is: 10,169.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.63 : 31,231.37 = 6,779.09 : x
  2. Step 2: Convert to fraction form
    20,819.63/31,231.37 = 6,779.09/x
  3. Step 3: Cross multiply
    20,819.63x = 31,231.37 × 6,779.09
  4. Step 4: Simplify right side
    20,819.63x = 211,720,363.08
  5. Step 5: Solve for x
    x = 211,720,363.08/20,819.63
  6. Step 6: Final answer
    x = 10,169.27

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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.