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Finding the Fourth Proportional to 8,831.28, 12,199.60 and 8,364.72

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Solution

The fourth proportional to 8,831.28, 12,199.60 and 8,364.72 is: 11,555.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,831.28 : 12,199.60 = 8,364.72 : x
  2. Step 2: Convert to fraction form
    8,831.28/12,199.60 = 8,364.72/x
  3. Step 3: Cross multiply
    8,831.28x = 12,199.60 × 8,364.72
  4. Step 4: Simplify right side
    8,831.28x = 102,046,238.11
  5. Step 5: Solve for x
    x = 102,046,238.11/8,831.28
  6. Step 6: Final answer
    x = 11,555.09

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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.