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Finding the Fourth Proportional to 18,540.72, 27,762.48 and 12,708.72

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Solution

The fourth proportional to 18,540.72, 27,762.48 and 12,708.72 is: 19,029.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,540.72 : 27,762.48 = 12,708.72 : x
  2. Step 2: Convert to fraction form
    18,540.72/27,762.48 = 12,708.72/x
  3. Step 3: Cross multiply
    18,540.72x = 27,762.48 × 12,708.72
  4. Step 4: Simplify right side
    18,540.72x = 352,825,584.83
  5. Step 5: Solve for x
    x = 352,825,584.83/18,540.72
  6. Step 6: Final answer
    x = 19,029.77

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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.