Home / 39,629.10-54,687.81-21,724.05

Finding the Fourth Proportional to 39,629.10, 54,687.81 and 21,724.05

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Solution

The fourth proportional to 39,629.10, 54,687.81 and 21,724.05 is: 29,979.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,629.10 : 54,687.81 = 21,724.05 : x
  2. Step 2: Convert to fraction form
    39,629.10/54,687.81 = 21,724.05/x
  3. Step 3: Cross multiply
    39,629.10x = 54,687.81 × 21,724.05
  4. Step 4: Simplify right side
    39,629.10x = 1,188,040,718.83
  5. Step 5: Solve for x
    x = 1,188,040,718.83/39,629.10
  6. Step 6: Final answer
    x = 29,979.00

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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.