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Finding the Fourth Proportional to 20,641.92, 30,961.67 and 6,790.92

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Solution

The fourth proportional to 20,641.92, 30,961.67 and 6,790.92 is: 10,185.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,641.92 : 30,961.67 = 6,790.92 : x
  2. Step 2: Convert to fraction form
    20,641.92/30,961.67 = 6,790.92/x
  3. Step 3: Cross multiply
    20,641.92x = 30,961.67 × 6,790.92
  4. Step 4: Simplify right side
    20,641.92x = 210,258,190.08
  5. Step 5: Solve for x
    x = 210,258,190.08/20,641.92
  6. Step 6: Final answer
    x = 10,185.98

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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.