Home / 20,739.19-28,620.09-11,786.46

Finding the Fourth Proportional to 20,739.19, 28,620.09 and 11,786.46

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Solution

The fourth proportional to 20,739.19, 28,620.09 and 11,786.46 is: 16,265.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.19 : 28,620.09 = 11,786.46 : x
  2. Step 2: Convert to fraction form
    20,739.19/28,620.09 = 11,786.46/x
  3. Step 3: Cross multiply
    20,739.19x = 28,620.09 × 11,786.46
  4. Step 4: Simplify right side
    20,739.19x = 337,329,487.05
  5. Step 5: Solve for x
    x = 337,329,487.05/20,739.19
  6. Step 6: Final answer
    x = 16,265.32

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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.