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Finding the Fourth Proportional to 27,268.80, 40,879.20 and 18,475.20

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Solution

The fourth proportional to 27,268.80, 40,879.20 and 18,475.20 is: 27,696.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,268.80 : 40,879.20 = 18,475.20 : x
  2. Step 2: Convert to fraction form
    27,268.80/40,879.20 = 18,475.20/x
  3. Step 3: Cross multiply
    27,268.80x = 40,879.20 × 18,475.20
  4. Step 4: Simplify right side
    27,268.80x = 755,251,395.84
  5. Step 5: Solve for x
    x = 755,251,395.84/27,268.80
  6. Step 6: Final answer
    x = 27,696.54

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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.