Home / 20,945.88-28,902.89-11,992.85

Finding the Fourth Proportional to 20,945.88, 28,902.89 and 11,992.85

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Solution

The fourth proportional to 20,945.88, 28,902.89 and 11,992.85 is: 16,548.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.88 : 28,902.89 = 11,992.85 : x
  2. Step 2: Convert to fraction form
    20,945.88/28,902.89 = 11,992.85/x
  3. Step 3: Cross multiply
    20,945.88x = 28,902.89 × 11,992.85
  4. Step 4: Simplify right side
    20,945.88x = 346,628,024.34
  5. Step 5: Solve for x
    x = 346,628,024.34/20,945.88
  6. Step 6: Final answer
    x = 16,548.74

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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.