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Finding the Fourth Proportional to 12,268.87, 16,921.88 and 8,285.83

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Solution

The fourth proportional to 12,268.87, 16,921.88 and 8,285.83 is: 11,428.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,268.87 : 16,921.88 = 8,285.83 : x
  2. Step 2: Convert to fraction form
    12,268.87/16,921.88 = 8,285.83/x
  3. Step 3: Cross multiply
    12,268.87x = 16,921.88 × 8,285.83
  4. Step 4: Simplify right side
    12,268.87x = 140,211,768.30
  5. Step 5: Solve for x
    x = 140,211,768.30/12,268.87
  6. Step 6: Final answer
    x = 11,428.26

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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.