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Finding the Fourth Proportional to 8,640.56, 11,923.53 and 4,863.80

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Solution

The fourth proportional to 8,640.56, 11,923.53 and 4,863.80 is: 6,711.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.56 : 11,923.53 = 4,863.80 : x
  2. Step 2: Convert to fraction form
    8,640.56/11,923.53 = 4,863.80/x
  3. Step 3: Cross multiply
    8,640.56x = 11,923.53 × 4,863.80
  4. Step 4: Simplify right side
    8,640.56x = 57,993,665.21
  5. Step 5: Solve for x
    x = 57,993,665.21/8,640.56
  6. Step 6: Final answer
    x = 6,711.79

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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.