Home / 20,743.25-28,625.69-11,311.88

Finding the Fourth Proportional to 20,743.25, 28,625.69 and 11,311.88

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Solution

The fourth proportional to 20,743.25, 28,625.69 and 11,311.88 is: 15,610.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,743.25 : 28,625.69 = 11,311.88 : x
  2. Step 2: Convert to fraction form
    20,743.25/28,625.69 = 11,311.88/x
  3. Step 3: Cross multiply
    20,743.25x = 28,625.69 × 11,311.88
  4. Step 4: Simplify right side
    20,743.25x = 323,810,313.64
  5. Step 5: Solve for x
    x = 323,810,313.64/20,743.25
  6. Step 6: Final answer
    x = 15,610.39

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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.