Home / 21,879.57-30,240.39-19,287.97

Finding the Fourth Proportional to 21,879.57, 30,240.39 and 19,287.97

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Solution

The fourth proportional to 21,879.57, 30,240.39 and 19,287.97 is: 26,658.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,879.57 : 30,240.39 = 19,287.97 : x
  2. Step 2: Convert to fraction form
    21,879.57/30,240.39 = 19,287.97/x
  3. Step 3: Cross multiply
    21,879.57x = 30,240.39 × 19,287.97
  4. Step 4: Simplify right side
    21,879.57x = 583,275,735.11
  5. Step 5: Solve for x
    x = 583,275,735.11/21,879.57
  6. Step 6: Final answer
    x = 26,658.46

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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.