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Finding the Fourth Proportional to 18,736.57, 28,105.23 and 7,635.57

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Solution

The fourth proportional to 18,736.57, 28,105.23 and 7,635.57 is: 11,453.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,736.57 : 28,105.23 = 7,635.57 : x
  2. Step 2: Convert to fraction form
    18,736.57/28,105.23 = 7,635.57/x
  3. Step 3: Cross multiply
    18,736.57x = 28,105.23 × 7,635.57
  4. Step 4: Simplify right side
    18,736.57x = 214,599,331.32
  5. Step 5: Solve for x
    x = 214,599,331.32/18,736.57
  6. Step 6: Final answer
    x = 11,453.50

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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.