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Finding the Fourth Proportional to 20,575.92, 30,861.44 and 5,377.48

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Solution

The fourth proportional to 20,575.92, 30,861.44 and 5,377.48 is: 8,065.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,575.92 : 30,861.44 = 5,377.48 : x
  2. Step 2: Convert to fraction form
    20,575.92/30,861.44 = 5,377.48/x
  3. Step 3: Cross multiply
    20,575.92x = 30,861.44 × 5,377.48
  4. Step 4: Simplify right side
    20,575.92x = 165,956,776.37
  5. Step 5: Solve for x
    x = 165,956,776.37/20,575.92
  6. Step 6: Final answer
    x = 8,065.58

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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.