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Finding the Fourth Proportional to 18,831.33, 28,212.57 and 8,817.71

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Solution

The fourth proportional to 18,831.33, 28,212.57 and 8,817.71 is: 13,210.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,831.33 : 28,212.57 = 8,817.71 : x
  2. Step 2: Convert to fraction form
    18,831.33/28,212.57 = 8,817.71/x
  3. Step 3: Cross multiply
    18,831.33x = 28,212.57 × 8,817.71
  4. Step 4: Simplify right side
    18,831.33x = 248,770,119.55
  5. Step 5: Solve for x
    x = 248,770,119.55/18,831.33
  6. Step 6: Final answer
    x = 13,210.44

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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.