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Finding the Fourth Proportional to 26,288.80, 39,346.80 and 18,512.80

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Solution

The fourth proportional to 26,288.80, 39,346.80 and 18,512.80 is: 27,708.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,288.80 : 39,346.80 = 18,512.80 : x
  2. Step 2: Convert to fraction form
    26,288.80/39,346.80 = 18,512.80/x
  3. Step 3: Cross multiply
    26,288.80x = 39,346.80 × 18,512.80
  4. Step 4: Simplify right side
    26,288.80x = 728,419,439.04
  5. Step 5: Solve for x
    x = 728,419,439.04/26,288.80
  6. Step 6: Final answer
    x = 27,708.36

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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.