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Finding the Fourth Proportional to 28,227.36, 39,004.50 and 20,255.58

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Solution

The fourth proportional to 28,227.36, 39,004.50 and 20,255.58 is: 27,989.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,227.36 : 39,004.50 = 20,255.58 : x
  2. Step 2: Convert to fraction form
    28,227.36/39,004.50 = 20,255.58/x
  3. Step 3: Cross multiply
    28,227.36x = 39,004.50 × 20,255.58
  4. Step 4: Simplify right side
    28,227.36x = 790,058,770.11
  5. Step 5: Solve for x
    x = 790,058,770.11/28,227.36
  6. Step 6: Final answer
    x = 27,989.11

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.