Home / 21,778.26-30,055.31-12,831.73

Finding the Fourth Proportional to 21,778.26, 30,055.31 and 12,831.73

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Solution

The fourth proportional to 21,778.26, 30,055.31 and 12,831.73 is: 17,708.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,778.26 : 30,055.31 = 12,831.73 : x
  2. Step 2: Convert to fraction form
    21,778.26/30,055.31 = 12,831.73/x
  3. Step 3: Cross multiply
    21,778.26x = 30,055.31 × 12,831.73
  4. Step 4: Simplify right side
    21,778.26x = 385,661,472.71
  5. Step 5: Solve for x
    x = 385,661,472.71/21,778.26
  6. Step 6: Final answer
    x = 17,708.55

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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.