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Finding the Fourth Proportional to 8,440.12, 11,636.49 and 6,922.09

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Solution

The fourth proportional to 8,440.12, 11,636.49 and 6,922.09 is: 9,543.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,440.12 : 11,636.49 = 6,922.09 : x
  2. Step 2: Convert to fraction form
    8,440.12/11,636.49 = 6,922.09/x
  3. Step 3: Cross multiply
    8,440.12x = 11,636.49 × 6,922.09
  4. Step 4: Simplify right side
    8,440.12x = 80,548,831.06
  5. Step 5: Solve for x
    x = 80,548,831.06/8,440.12
  6. Step 6: Final answer
    x = 9,543.56

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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.