Home / 39,896.51-55,056.91-21,991.53

Finding the Fourth Proportional to 39,896.51, 55,056.91 and 21,991.53

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Solution

The fourth proportional to 39,896.51, 55,056.91 and 21,991.53 is: 30,348.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,896.51 : 55,056.91 = 21,991.53 : x
  2. Step 2: Convert to fraction form
    39,896.51/55,056.91 = 21,991.53/x
  3. Step 3: Cross multiply
    39,896.51x = 55,056.91 × 21,991.53
  4. Step 4: Simplify right side
    39,896.51x = 1,210,785,687.97
  5. Step 5: Solve for x
    x = 1,210,785,687.97/39,896.51
  6. Step 6: Final answer
    x = 30,348.16

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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.