Home / 20,169.20-27,831.36-11,215.25

Finding the Fourth Proportional to 20,169.20, 27,831.36 and 11,215.25

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Solution

The fourth proportional to 20,169.20, 27,831.36 and 11,215.25 is: 15,475.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,169.20 : 27,831.36 = 11,215.25 : x
  2. Step 2: Convert to fraction form
    20,169.20/27,831.36 = 11,215.25/x
  3. Step 3: Cross multiply
    20,169.20x = 27,831.36 × 11,215.25
  4. Step 4: Simplify right side
    20,169.20x = 312,135,660.24
  5. Step 5: Solve for x
    x = 312,135,660.24/20,169.20
  6. Step 6: Final answer
    x = 15,475.86

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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.