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Finding the Fourth Proportional to 18,753.92, 28,144.58 and 13,836.80

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Solution

The fourth proportional to 18,753.92, 28,144.58 and 13,836.80 is: 20,765.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753.92 : 28,144.58 = 13,836.80 : x
  2. Step 2: Convert to fraction form
    18,753.92/28,144.58 = 13,836.80/x
  3. Step 3: Cross multiply
    18,753.92x = 28,144.58 × 13,836.80
  4. Step 4: Simplify right side
    18,753.92x = 389,430,924.54
  5. Step 5: Solve for x
    x = 389,430,924.54/18,753.92
  6. Step 6: Final answer
    x = 20,765.31

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1.5x scale

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.