Home / 39,684.20-54,765.77-21,779.85

Finding the Fourth Proportional to 39,684.20, 54,765.77 and 21,779.85

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Solution

The fourth proportional to 39,684.20, 54,765.77 and 21,779.85 is: 30,057.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,684.20 : 54,765.77 = 21,779.85 : x
  2. Step 2: Convert to fraction form
    39,684.20/54,765.77 = 21,779.85/x
  3. Step 3: Cross multiply
    39,684.20x = 54,765.77 × 21,779.85
  4. Step 4: Simplify right side
    39,684.20x = 1,192,790,255.73
  5. Step 5: Solve for x
    x = 1,192,790,255.73/39,684.20
  6. Step 6: Final answer
    x = 30,057.06

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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.