Home / 20,745.87-31,090.91-11,371.83

Finding the Fourth Proportional to 20,745.87, 31,090.91 and 11,371.83

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Solution

The fourth proportional to 20,745.87, 31,090.91 and 11,371.83 is: 17,042.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.87 : 31,090.91 = 11,371.83 : x
  2. Step 2: Convert to fraction form
    20,745.87/31,090.91 = 11,371.83/x
  3. Step 3: Cross multiply
    20,745.87x = 31,090.91 × 11,371.83
  4. Step 4: Simplify right side
    20,745.87x = 353,560,486.21
  5. Step 5: Solve for x
    x = 353,560,486.21/20,745.87
  6. Step 6: Final answer
    x = 17,042.45

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1.5x scale

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.