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Finding the Fourth Proportional to 8,609.05, 11,879.51 and 4,831.71

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Solution

The fourth proportional to 8,609.05, 11,879.51 and 4,831.71 is: 6,667.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,609.05 : 11,879.51 = 4,831.71 : x
  2. Step 2: Convert to fraction form
    8,609.05/11,879.51 = 4,831.71/x
  3. Step 3: Cross multiply
    8,609.05x = 11,879.51 × 4,831.71
  4. Step 4: Simplify right side
    8,609.05x = 57,398,287.86
  5. Step 5: Solve for x
    x = 57,398,287.86/8,609.05
  6. Step 6: Final answer
    x = 6,667.20

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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.