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Finding the Fourth Proportional to 29,687.60, 44,596.20 and 20,939.60

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Solution

The fourth proportional to 29,687.60, 44,596.20 and 20,939.60 is: 31,455.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,687.60 : 44,596.20 = 20,939.60 : x
  2. Step 2: Convert to fraction form
    29,687.60/44,596.20 = 20,939.60/x
  3. Step 3: Cross multiply
    29,687.60x = 44,596.20 × 20,939.60
  4. Step 4: Simplify right side
    29,687.60x = 933,826,589.52
  5. Step 5: Solve for x
    x = 933,826,589.52/29,687.60
  6. Step 6: Final answer
    x = 31,455.11

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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.