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Finding the Fourth Proportional to 20,575.56, 30,786.80 and 12,260.10

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Solution

The fourth proportional to 20,575.56, 30,786.80 and 12,260.10 is: 18,344.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,575.56 : 30,786.80 = 12,260.10 : x
  2. Step 2: Convert to fraction form
    20,575.56/30,786.80 = 12,260.10/x
  3. Step 3: Cross multiply
    20,575.56x = 30,786.80 × 12,260.10
  4. Step 4: Simplify right side
    20,575.56x = 377,449,185.38
  5. Step 5: Solve for x
    x = 377,449,185.38/20,575.56
  6. Step 6: Final answer
    x = 18,344.54

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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.