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Finding the Fourth Proportional to 8,640.66, 11,923.96 and 5,104.20

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Solution

The fourth proportional to 8,640.66, 11,923.96 and 5,104.20 is: 7,043.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.66 : 11,923.96 = 5,104.20 : x
  2. Step 2: Convert to fraction form
    8,640.66/11,923.96 = 5,104.20/x
  3. Step 3: Cross multiply
    8,640.66x = 11,923.96 × 5,104.20
  4. Step 4: Simplify right side
    8,640.66x = 60,862,276.63
  5. Step 5: Solve for x
    x = 60,862,276.63/8,640.66
  6. Step 6: Final answer
    x = 7,043.71

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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.