Home / 20,453.10-28,227.60-11,379.36

Finding the Fourth Proportional to 20,453.10, 28,227.60 and 11,379.36

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Solution

The fourth proportional to 20,453.10, 28,227.60 and 11,379.36 is: 15,704.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,453.10 : 28,227.60 = 11,379.36 : x
  2. Step 2: Convert to fraction form
    20,453.10/28,227.60 = 11,379.36/x
  3. Step 3: Cross multiply
    20,453.10x = 28,227.60 × 11,379.36
  4. Step 4: Simplify right side
    20,453.10x = 321,212,022.34
  5. Step 5: Solve for x
    x = 321,212,022.34/20,453.10
  6. Step 6: Final answer
    x = 15,704.81

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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.