Home / 39,778.32-54,893.19-21,628.65

Finding the Fourth Proportional to 39,778.32, 54,893.19 and 21,628.65

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Solution

The fourth proportional to 39,778.32, 54,893.19 and 21,628.65 is: 29,847.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,778.32 : 54,893.19 = 21,628.65 : x
  2. Step 2: Convert to fraction form
    39,778.32/54,893.19 = 21,628.65/x
  3. Step 3: Cross multiply
    39,778.32x = 54,893.19 × 21,628.65
  4. Step 4: Simplify right side
    39,778.32x = 1,187,265,880.85
  5. Step 5: Solve for x
    x = 1,187,265,880.85/39,778.32
  6. Step 6: Final answer
    x = 29,847.06

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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.