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Finding the Fourth Proportional to 28,791.80, 43,107.03 and 21,749.66

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Solution

The fourth proportional to 28,791.80, 43,107.03 and 21,749.66 is: 32,563.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,791.80 : 43,107.03 = 21,749.66 : x
  2. Step 2: Convert to fraction form
    28,791.80/43,107.03 = 21,749.66/x
  3. Step 3: Cross multiply
    28,791.80x = 43,107.03 × 21,749.66
  4. Step 4: Simplify right side
    28,791.80x = 937,563,030.57
  5. Step 5: Solve for x
    x = 937,563,030.57/28,791.80
  6. Step 6: Final answer
    x = 32,563.55

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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.