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Finding the Fourth Proportional to 18,666, 25,770.69 and 12,855.06

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Solution

The fourth proportional to 18,666, 25,770.69 and 12,855.06 is: 17,747.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,666 : 25,770.69 = 12,855.06 : x
  2. Step 2: Convert to fraction form
    18,666/25,770.69 = 12,855.06/x
  3. Step 3: Cross multiply
    18,666x = 25,770.69 × 12,855.06
  4. Step 4: Simplify right side
    18,666x = 331,283,766.19
  5. Step 5: Solve for x
    x = 331,283,766.19/18,666
  6. Step 6: Final answer
    x = 17,747.98

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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.