Home / 21,831.39-30,125.52-12,879.27

Finding the Fourth Proportional to 21,831.39, 30,125.52 and 12,879.27

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Solution

The fourth proportional to 21,831.39, 30,125.52 and 12,879.27 is: 17,772.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,831.39 : 30,125.52 = 12,879.27 : x
  2. Step 2: Convert to fraction form
    21,831.39/30,125.52 = 12,879.27/x
  3. Step 3: Cross multiply
    21,831.39x = 30,125.52 × 12,879.27
  4. Step 4: Simplify right side
    21,831.39x = 387,994,705.97
  5. Step 5: Solve for x
    x = 387,994,705.97/21,831.39
  6. Step 6: Final answer
    x = 17,772.33

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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.