Home / 39,629.10-54,687.82-21,724.09

Finding the Fourth Proportional to 39,629.10, 54,687.82 and 21,724.09

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Solution

The fourth proportional to 39,629.10, 54,687.82 and 21,724.09 is: 29,979.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,629.10 : 54,687.82 = 21,724.09 : x
  2. Step 2: Convert to fraction form
    39,629.10/54,687.82 = 21,724.09/x
  3. Step 3: Cross multiply
    39,629.10x = 54,687.82 × 21,724.09
  4. Step 4: Simplify right side
    39,629.10x = 1,188,043,123.58
  5. Step 5: Solve for x
    x = 1,188,043,123.58/39,629.10
  6. Step 6: Final answer
    x = 29,979.06

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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.