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Finding the Fourth Proportional to 8,640.28, 11,906.94 and 6,278.68

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Solution

The fourth proportional to 8,640.28, 11,906.94 and 6,278.68 is: 8,652.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.28 : 11,906.94 = 6,278.68 : x
  2. Step 2: Convert to fraction form
    8,640.28/11,906.94 = 6,278.68/x
  3. Step 3: Cross multiply
    8,640.28x = 11,906.94 × 6,278.68
  4. Step 4: Simplify right side
    8,640.28x = 74,759,866.04
  5. Step 5: Solve for x
    x = 74,759,866.04/8,640.28
  6. Step 6: Final answer
    x = 8,652.48

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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.