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Finding the Fourth Proportional to 19,912.50, 27,481.08 and 10,961.82

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Solution

The fourth proportional to 19,912.50, 27,481.08 and 10,961.82 is: 15,128.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,912.50 : 27,481.08 = 10,961.82 : x
  2. Step 2: Convert to fraction form
    19,912.50/27,481.08 = 10,961.82/x
  3. Step 3: Cross multiply
    19,912.50x = 27,481.08 × 10,961.82
  4. Step 4: Simplify right side
    19,912.50x = 301,242,652.37
  5. Step 5: Solve for x
    x = 301,242,652.37/19,912.50
  6. Step 6: Final answer
    x = 15,128.32

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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.