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Finding the Fourth Proportional to 12,201.40, 18,305.94 and 7,276.60

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Solution

The fourth proportional to 12,201.40, 18,305.94 and 7,276.60 is: 10,917.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,201.40 : 18,305.94 = 7,276.60 : x
  2. Step 2: Convert to fraction form
    12,201.40/18,305.94 = 7,276.60/x
  3. Step 3: Cross multiply
    12,201.40x = 18,305.94 × 7,276.60
  4. Step 4: Simplify right side
    12,201.40x = 133,205,003.00
  5. Step 5: Solve for x
    x = 133,205,003.00/12,201.40
  6. Step 6: Final answer
    x = 10,917.19

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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.