Home / 39,628.89-54,687.62-21,724.65

Finding the Fourth Proportional to 39,628.89, 54,687.62 and 21,724.65

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Solution

The fourth proportional to 39,628.89, 54,687.62 and 21,724.65 is: 29,979.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,628.89 : 54,687.62 = 21,724.65 : x
  2. Step 2: Convert to fraction form
    39,628.89/54,687.62 = 21,724.65/x
  3. Step 3: Cross multiply
    39,628.89x = 54,687.62 × 21,724.65
  4. Step 4: Simplify right side
    39,628.89x = 1,188,069,403.83
  5. Step 5: Solve for x
    x = 1,188,069,403.83/39,628.89
  6. Step 6: Final answer
    x = 29,979.88

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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.