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Finding the Fourth Proportional to 21,591.97, 32,406.41 and 8,453.57

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Solution

The fourth proportional to 21,591.97, 32,406.41 and 8,453.57 is: 12,687.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,591.97 : 32,406.41 = 8,453.57 : x
  2. Step 2: Convert to fraction form
    21,591.97/32,406.41 = 8,453.57/x
  3. Step 3: Cross multiply
    21,591.97x = 32,406.41 × 8,453.57
  4. Step 4: Simplify right side
    21,591.97x = 273,949,714.49
  5. Step 5: Solve for x
    x = 273,949,714.49/21,591.97
  6. Step 6: Final answer
    x = 12,687.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.