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Finding the Fourth Proportional to 39,391.20, 59,077.80 and 11,311.03

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Solution

The fourth proportional to 39,391.20, 59,077.80 and 11,311.03 is: 16,963.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,391.20 : 59,077.80 = 11,311.03 : x
  2. Step 2: Convert to fraction form
    39,391.20/59,077.80 = 11,311.03/x
  3. Step 3: Cross multiply
    39,391.20x = 59,077.80 × 11,311.03
  4. Step 4: Simplify right side
    39,391.20x = 668,230,563.88
  5. Step 5: Solve for x
    x = 668,230,563.88/39,391.20
  6. Step 6: Final answer
    x = 16,963.96

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.