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Finding the Fourth Proportional to 26,896.80, 40,388.40 and 20,330.40

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Solution

The fourth proportional to 26,896.80, 40,388.40 and 20,330.40 is: 30,528.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,896.80 : 40,388.40 = 20,330.40 : x
  2. Step 2: Convert to fraction form
    26,896.80/40,388.40 = 20,330.40/x
  3. Step 3: Cross multiply
    26,896.80x = 40,388.40 × 20,330.40
  4. Step 4: Simplify right side
    26,896.80x = 821,112,327.36
  5. Step 5: Solve for x
    x = 821,112,327.36/26,896.80
  6. Step 6: Final answer
    x = 30,528.25

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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.