Home / 20,983.99-31,383-18,660.28

Finding the Fourth Proportional to 20,983.99, 31,383 and 18,660.28

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Solution

The fourth proportional to 20,983.99, 31,383 and 18,660.28 is: 27,907.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983.99 : 31,383 = 18,660.28 : x
  2. Step 2: Convert to fraction form
    20,983.99/31,383 = 18,660.28/x
  3. Step 3: Cross multiply
    20,983.99x = 31,383 × 18,660.28
  4. Step 4: Simplify right side
    20,983.99x = 585,615,567.24
  5. Step 5: Solve for x
    x = 585,615,567.24/20,983.99
  6. Step 6: Final answer
    x = 27,907.73

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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.