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Finding the Fourth Proportional to 28,744.56, 39,662.80 and 16,168.56

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Solution

The fourth proportional to 28,744.56, 39,662.80 and 16,168.56 is: 22,309.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,744.56 : 39,662.80 = 16,168.56 : x
  2. Step 2: Convert to fraction form
    28,744.56/39,662.80 = 16,168.56/x
  3. Step 3: Cross multiply
    28,744.56x = 39,662.80 × 16,168.56
  4. Step 4: Simplify right side
    28,744.56x = 641,290,361.57
  5. Step 5: Solve for x
    x = 641,290,361.57/28,744.56
  6. Step 6: Final answer
    x = 22,309.97

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1.5x scale

Why These Related Problems?

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