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Finding the Fourth Proportional to 8,831.28, 12,188.22 and 5,105.28

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Solution

The fourth proportional to 8,831.28, 12,188.22 and 5,105.28 is: 7,045.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,831.28 : 12,188.22 = 5,105.28 : x
  2. Step 2: Convert to fraction form
    8,831.28/12,188.22 = 5,105.28/x
  3. Step 3: Cross multiply
    8,831.28x = 12,188.22 × 5,105.28
  4. Step 4: Simplify right side
    8,831.28x = 62,224,275.80
  5. Step 5: Solve for x
    x = 62,224,275.80/8,831.28
  6. Step 6: Final answer
    x = 7,045.90

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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.