Home / 20,269.20-27,971.70-11,771.88

Finding the Fourth Proportional to 20,269.20, 27,971.70 and 11,771.88

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Solution

The fourth proportional to 20,269.20, 27,971.70 and 11,771.88 is: 16,245.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,269.20 : 27,971.70 = 11,771.88 : x
  2. Step 2: Convert to fraction form
    20,269.20/27,971.70 = 11,771.88/x
  3. Step 3: Cross multiply
    20,269.20x = 27,971.70 × 11,771.88
  4. Step 4: Simplify right side
    20,269.20x = 329,279,495.80
  5. Step 5: Solve for x
    x = 329,279,495.80/20,269.20
  6. Step 6: Final answer
    x = 16,245.31

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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.