Home / 20,739.56-28,619.88-11,786.90

Finding the Fourth Proportional to 20,739.56, 28,619.88 and 11,786.90

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Solution

The fourth proportional to 20,739.56, 28,619.88 and 11,786.90 is: 16,265.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.56 : 28,619.88 = 11,786.90 : x
  2. Step 2: Convert to fraction form
    20,739.56/28,619.88 = 11,786.90/x
  3. Step 3: Cross multiply
    20,739.56x = 28,619.88 × 11,786.90
  4. Step 4: Simplify right side
    20,739.56x = 337,339,663.57
  5. Step 5: Solve for x
    x = 337,339,663.57/20,739.56
  6. Step 6: Final answer
    x = 16,265.52

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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.