Home / 20,515.92-30,831.59-12,197.42

Finding the Fourth Proportional to 20,515.92, 30,831.59 and 12,197.42

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Solution

The fourth proportional to 20,515.92, 30,831.59 and 12,197.42 is: 18,330.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.92 : 30,831.59 = 12,197.42 : x
  2. Step 2: Convert to fraction form
    20,515.92/30,831.59 = 12,197.42/x
  3. Step 3: Cross multiply
    20,515.92x = 30,831.59 × 12,197.42
  4. Step 4: Simplify right side
    20,515.92x = 376,065,852.50
  5. Step 5: Solve for x
    x = 376,065,852.50/20,515.92
  6. Step 6: Final answer
    x = 18,330.44

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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.