Home / 20,221.77-30,304.97-12,831.42

Finding the Fourth Proportional to 20,221.77, 30,304.97 and 12,831.42

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Solution

The fourth proportional to 20,221.77, 30,304.97 and 12,831.42 is: 19,229.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,221.77 : 30,304.97 = 12,831.42 : x
  2. Step 2: Convert to fraction form
    20,221.77/30,304.97 = 12,831.42/x
  3. Step 3: Cross multiply
    20,221.77x = 30,304.97 × 12,831.42
  4. Step 4: Simplify right side
    20,221.77x = 388,855,798.16
  5. Step 5: Solve for x
    x = 388,855,798.16/20,221.77
  6. Step 6: Final answer
    x = 19,229.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.