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Finding the Fourth Proportional to 19,410.40, 26,786.40 and 11,027.20

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Solution

The fourth proportional to 19,410.40, 26,786.40 and 11,027.20 is: 15,217.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,410.40 : 26,786.40 = 11,027.20 : x
  2. Step 2: Convert to fraction form
    19,410.40/26,786.40 = 11,027.20/x
  3. Step 3: Cross multiply
    19,410.40x = 26,786.40 × 11,027.20
  4. Step 4: Simplify right side
    19,410.40x = 295,378,990.08
  5. Step 5: Solve for x
    x = 295,378,990.08/19,410.40
  6. Step 6: Final answer
    x = 15,217.56

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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.