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Finding the Fourth Proportional to 18,538.50, 25,583.13 and 11,086.50

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Solution

The fourth proportional to 18,538.50, 25,583.13 and 11,086.50 is: 15,299.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,538.50 : 25,583.13 = 11,086.50 : x
  2. Step 2: Convert to fraction form
    18,538.50/25,583.13 = 11,086.50/x
  3. Step 3: Cross multiply
    18,538.50x = 25,583.13 × 11,086.50
  4. Step 4: Simplify right side
    18,538.50x = 283,627,370.75
  5. Step 5: Solve for x
    x = 283,627,370.75/18,538.50
  6. Step 6: Final answer
    x = 15,299.37

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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.