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Finding the Fourth Proportional to 18,205.88, 25,131.87 and 12,241.00

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Solution

The fourth proportional to 18,205.88, 25,131.87 and 12,241.00 is: 16,897.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,205.88 : 25,131.87 = 12,241.00 : x
  2. Step 2: Convert to fraction form
    18,205.88/25,131.87 = 12,241.00/x
  3. Step 3: Cross multiply
    18,205.88x = 25,131.87 × 12,241.00
  4. Step 4: Simplify right side
    18,205.88x = 307,639,033.81
  5. Step 5: Solve for x
    x = 307,639,033.81/18,205.88
  6. Step 6: Final answer
    x = 16,897.78

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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.