Home / 39,810.36-54,939.60-21,906.66

Finding the Fourth Proportional to 39,810.36, 54,939.60 and 21,906.66

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Solution

The fourth proportional to 39,810.36, 54,939.60 and 21,906.66 is: 30,231.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,810.36 : 54,939.60 = 21,906.66 : x
  2. Step 2: Convert to fraction form
    39,810.36/54,939.60 = 21,906.66/x
  3. Step 3: Cross multiply
    39,810.36x = 54,939.60 × 21,906.66
  4. Step 4: Simplify right side
    39,810.36x = 1,203,543,137.74
  5. Step 5: Solve for x
    x = 1,203,543,137.74/39,810.36
  6. Step 6: Final answer
    x = 30,231.91

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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.