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Finding the Fourth Proportional to 20,625.80, 30,949.90 and 8,777.64

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Solution

The fourth proportional to 20,625.80, 30,949.90 and 8,777.64 is: 13,171.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,625.80 : 30,949.90 = 8,777.64 : x
  2. Step 2: Convert to fraction form
    20,625.80/30,949.90 = 8,777.64/x
  3. Step 3: Cross multiply
    20,625.80x = 30,949.90 × 8,777.64
  4. Step 4: Simplify right side
    20,625.80x = 271,667,080.24
  5. Step 5: Solve for x
    x = 271,667,080.24/20,625.80
  6. Step 6: Final answer
    x = 13,171.23

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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.