Home / 20,491.23-28,279.92-11,992.84

Finding the Fourth Proportional to 20,491.23, 28,279.92 and 11,992.84

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Solution

The fourth proportional to 20,491.23, 28,279.92 and 11,992.84 is: 16,551.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.23 : 28,279.92 = 11,992.84 : x
  2. Step 2: Convert to fraction form
    20,491.23/28,279.92 = 11,992.84/x
  3. Step 3: Cross multiply
    20,491.23x = 28,279.92 × 11,992.84
  4. Step 4: Simplify right side
    20,491.23x = 339,156,591.12
  5. Step 5: Solve for x
    x = 339,156,591.12/20,491.23
  6. Step 6: Final answer
    x = 16,551.31

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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.