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Finding the Fourth Proportional to 8,305.20, 12,392.73 and 8,256.60

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Solution

The fourth proportional to 8,305.20, 12,392.73 and 8,256.60 is: 12,320.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,305.20 : 12,392.73 = 8,256.60 : x
  2. Step 2: Convert to fraction form
    8,305.20/12,392.73 = 8,256.60/x
  3. Step 3: Cross multiply
    8,305.20x = 12,392.73 × 8,256.60
  4. Step 4: Simplify right side
    8,305.20x = 102,321,814.52
  5. Step 5: Solve for x
    x = 102,321,814.52/8,305.20
  6. Step 6: Final answer
    x = 12,320.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.