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Finding the Fourth Proportional to 18,701.69, 25,817.69 and 11,630.39

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Solution

The fourth proportional to 18,701.69, 25,817.69 and 11,630.39 is: 16,055.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,701.69 : 25,817.69 = 11,630.39 : x
  2. Step 2: Convert to fraction form
    18,701.69/25,817.69 = 11,630.39/x
  3. Step 3: Cross multiply
    18,701.69x = 25,817.69 × 11,630.39
  4. Step 4: Simplify right side
    18,701.69x = 300,269,745.45
  5. Step 5: Solve for x
    x = 300,269,745.45/18,701.69
  6. Step 6: Final answer
    x = 16,055.75

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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.