Home / 20,909.44-28,855.04-11,956.87

Finding the Fourth Proportional to 20,909.44, 28,855.04 and 11,956.87

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Solution

The fourth proportional to 20,909.44, 28,855.04 and 11,956.87 is: 16,500.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.44 : 28,855.04 = 11,956.87 : x
  2. Step 2: Convert to fraction form
    20,909.44/28,855.04 = 11,956.87/x
  3. Step 3: Cross multiply
    20,909.44x = 28,855.04 × 11,956.87
  4. Step 4: Simplify right side
    20,909.44x = 345,015,776.10
  5. Step 5: Solve for x
    x = 345,015,776.10/20,909.44
  6. Step 6: Final answer
    x = 16,500.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.