Home / 20,942.85-28,900.94-11,991.93

Finding the Fourth Proportional to 20,942.85, 28,900.94 and 11,991.93

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Solution

The fourth proportional to 20,942.85, 28,900.94 and 11,991.93 is: 16,548.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.85 : 28,900.94 = 11,991.93 : x
  2. Step 2: Convert to fraction form
    20,942.85/28,900.94 = 11,991.93/x
  3. Step 3: Cross multiply
    20,942.85x = 28,900.94 × 11,991.93
  4. Step 4: Simplify right side
    20,942.85x = 346,577,989.45
  5. Step 5: Solve for x
    x = 346,577,989.45/20,942.85
  6. Step 6: Final answer
    x = 16,548.75

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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.