Home / 20,836.54-28,754.62-11,405.30

Finding the Fourth Proportional to 20,836.54, 28,754.62 and 11,405.30

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Solution

The fourth proportional to 20,836.54, 28,754.62 and 11,405.30 is: 15,739.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,836.54 : 28,754.62 = 11,405.30 : x
  2. Step 2: Convert to fraction form
    20,836.54/28,754.62 = 11,405.30/x
  3. Step 3: Cross multiply
    20,836.54x = 28,754.62 × 11,405.30
  4. Step 4: Simplify right side
    20,836.54x = 327,955,067.49
  5. Step 5: Solve for x
    x = 327,955,067.49/20,836.54
  6. Step 6: Final answer
    x = 15,739.42

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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.