Home / 20,836.75-28,754.99-11,405.11

Finding the Fourth Proportional to 20,836.75, 28,754.99 and 11,405.11

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Solution

The fourth proportional to 20,836.75, 28,754.99 and 11,405.11 is: 15,739.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,836.75 : 28,754.99 = 11,405.11 : x
  2. Step 2: Convert to fraction form
    20,836.75/28,754.99 = 11,405.11/x
  3. Step 3: Cross multiply
    20,836.75x = 28,754.99 × 11,405.11
  4. Step 4: Simplify right side
    20,836.75x = 327,953,824.00
  5. Step 5: Solve for x
    x = 327,953,824.00/20,836.75
  6. Step 6: Final answer
    x = 15,739.20

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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.