Home / 39,683.20-54,764.39-21,778.85

Finding the Fourth Proportional to 39,683.20, 54,764.39 and 21,778.85

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Solution

The fourth proportional to 39,683.20, 54,764.39 and 21,778.85 is: 30,055.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,683.20 : 54,764.39 = 21,778.85 : x
  2. Step 2: Convert to fraction form
    39,683.20/54,764.39 = 21,778.85/x
  3. Step 3: Cross multiply
    39,683.20x = 54,764.39 × 21,778.85
  4. Step 4: Simplify right side
    39,683.20x = 1,192,705,435.15
  5. Step 5: Solve for x
    x = 1,192,705,435.15/39,683.20
  6. Step 6: Final answer
    x = 30,055.68

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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.