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Finding the Fourth Proportional to 13,610.40, 20,415.60 and 13,027.20

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Solution

The fourth proportional to 13,610.40, 20,415.60 and 13,027.20 is: 19,540.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,610.40 : 20,415.60 = 13,027.20 : x
  2. Step 2: Convert to fraction form
    13,610.40/20,415.60 = 13,027.20/x
  3. Step 3: Cross multiply
    13,610.40x = 20,415.60 × 13,027.20
  4. Step 4: Simplify right side
    13,610.40x = 265,958,104.32
  5. Step 5: Solve for x
    x = 265,958,104.32/13,610.40
  6. Step 6: Final answer
    x = 19,540.80

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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.