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Finding the Fourth Proportional to 20,625.92, 30,941.96 and 8,779.60

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Solution

The fourth proportional to 20,625.92, 30,941.96 and 8,779.60 is: 13,170.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,625.92 : 30,941.96 = 8,779.60 : x
  2. Step 2: Convert to fraction form
    20,625.92/30,941.96 = 8,779.60/x
  3. Step 3: Cross multiply
    20,625.92x = 30,941.96 × 8,779.60
  4. Step 4: Simplify right side
    20,625.92x = 271,658,032.02
  5. Step 5: Solve for x
    x = 271,658,032.02/20,625.92
  6. Step 6: Final answer
    x = 13,170.71

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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.