Home / 20,911.14-28,849.16-11,953.85

Finding the Fourth Proportional to 20,911.14, 28,849.16 and 11,953.85

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Solution

The fourth proportional to 20,911.14, 28,849.16 and 11,953.85 is: 16,491.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.14 : 28,849.16 = 11,953.85 : x
  2. Step 2: Convert to fraction form
    20,911.14/28,849.16 = 11,953.85/x
  3. Step 3: Cross multiply
    20,911.14x = 28,849.16 × 11,953.85
  4. Step 4: Simplify right side
    20,911.14x = 344,858,416.90
  5. Step 5: Solve for x
    x = 344,858,416.90/20,911.14
  6. Step 6: Final answer
    x = 16,491.61

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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.