Home / 21,879.40-30,124.38-19,883.92

Finding the Fourth Proportional to 21,879.40, 30,124.38 and 19,883.92

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Solution

The fourth proportional to 21,879.40, 30,124.38 and 19,883.92 is: 27,376.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,879.40 : 30,124.38 = 19,883.92 : x
  2. Step 2: Convert to fraction form
    21,879.40/30,124.38 = 19,883.92/x
  3. Step 3: Cross multiply
    21,879.40x = 30,124.38 × 19,883.92
  4. Step 4: Simplify right side
    21,879.40x = 598,990,761.97
  5. Step 5: Solve for x
    x = 598,990,761.97/21,879.40
  6. Step 6: Final answer
    x = 27,376.93

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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.