Home / 20,739.06-28,619.19-11,786.40

Finding the Fourth Proportional to 20,739.06, 28,619.19 and 11,786.40

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Solution

The fourth proportional to 20,739.06, 28,619.19 and 11,786.40 is: 16,264.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.06 : 28,619.19 = 11,786.40 : x
  2. Step 2: Convert to fraction form
    20,739.06/28,619.19 = 11,786.40/x
  3. Step 3: Cross multiply
    20,739.06x = 28,619.19 × 11,786.40
  4. Step 4: Simplify right side
    20,739.06x = 337,317,221.02
  5. Step 5: Solve for x
    x = 337,317,221.02/20,739.06
  6. Step 6: Final answer
    x = 16,264.83

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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.