Home / 20,749.99-28,635.38-11,318.89

Finding the Fourth Proportional to 20,749.99, 28,635.38 and 11,318.89

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Solution

The fourth proportional to 20,749.99, 28,635.38 and 11,318.89 is: 15,620.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.99 : 28,635.38 = 11,318.89 : x
  2. Step 2: Convert to fraction form
    20,749.99/28,635.38 = 11,318.89/x
  3. Step 3: Cross multiply
    20,749.99x = 28,635.38 × 11,318.89
  4. Step 4: Simplify right side
    20,749.99x = 324,120,716.33
  5. Step 5: Solve for x
    x = 324,120,716.33/20,749.99
  6. Step 6: Final answer
    x = 15,620.28

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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.