Home / 39,896.83-55,057.77-21,991.45

Finding the Fourth Proportional to 39,896.83, 55,057.77 and 21,991.45

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Solution

The fourth proportional to 39,896.83, 55,057.77 and 21,991.45 is: 30,348.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,896.83 : 55,057.77 = 21,991.45 : x
  2. Step 2: Convert to fraction form
    39,896.83/55,057.77 = 21,991.45/x
  3. Step 3: Cross multiply
    39,896.83x = 55,057.77 × 21,991.45
  4. Step 4: Simplify right side
    39,896.83x = 1,210,800,196.07
  5. Step 5: Solve for x
    x = 1,210,800,196.07/39,896.83
  6. Step 6: Final answer
    x = 30,348.28

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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.