Home / 20,686.37-28,553.64-11,739.83

Finding the Fourth Proportional to 20,686.37, 28,553.64 and 11,739.83

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Solution

The fourth proportional to 20,686.37, 28,553.64 and 11,739.83 is: 16,204.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686.37 : 28,553.64 = 11,739.83 : x
  2. Step 2: Convert to fraction form
    20,686.37/28,553.64 = 11,739.83/x
  3. Step 3: Cross multiply
    20,686.37x = 28,553.64 × 11,739.83
  4. Step 4: Simplify right side
    20,686.37x = 335,214,879.48
  5. Step 5: Solve for x
    x = 335,214,879.48/20,686.37
  6. Step 6: Final answer
    x = 16,204.63

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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.