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Finding the Fourth Proportional to 19,297.20, 28,945.80 and 6,831.30

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Solution

The fourth proportional to 19,297.20, 28,945.80 and 6,831.30 is: 10,246.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,297.20 : 28,945.80 = 6,831.30 : x
  2. Step 2: Convert to fraction form
    19,297.20/28,945.80 = 6,831.30/x
  3. Step 3: Cross multiply
    19,297.20x = 28,945.80 × 6,831.30
  4. Step 4: Simplify right side
    19,297.20x = 197,737,443.54
  5. Step 5: Solve for x
    x = 197,737,443.54/19,297.20
  6. Step 6: Final answer
    x = 10,246.95

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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.