Home / 20,797.08-31,166.44-13,857

Finding the Fourth Proportional to 20,797.08, 31,166.44 and 13,857

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Solution

The fourth proportional to 20,797.08, 31,166.44 and 13,857 is: 20,766.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,797.08 : 31,166.44 = 13,857 : x
  2. Step 2: Convert to fraction form
    20,797.08/31,166.44 = 13,857/x
  3. Step 3: Cross multiply
    20,797.08x = 31,166.44 × 13,857
  4. Step 4: Simplify right side
    20,797.08x = 431,873,359.08
  5. Step 5: Solve for x
    x = 431,873,359.08/20,797.08
  6. Step 6: Final answer
    x = 20,766.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.