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Finding the Fourth Proportional to 26,606.70, 39,900.60 and 11,789.10

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Solution

The fourth proportional to 26,606.70, 39,900.60 and 11,789.10 is: 17,679.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,606.70 : 39,900.60 = 11,789.10 : x
  2. Step 2: Convert to fraction form
    26,606.70/39,900.60 = 11,789.10/x
  3. Step 3: Cross multiply
    26,606.70x = 39,900.60 × 11,789.10
  4. Step 4: Simplify right side
    26,606.70x = 470,392,163.46
  5. Step 5: Solve for x
    x = 470,392,163.46/26,606.70
  6. Step 6: Final answer
    x = 17,679.46

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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.