Home / 20,986.36-28,831.57-18,777.48

Finding the Fourth Proportional to 20,986.36, 28,831.57 and 18,777.48

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Solution

The fourth proportional to 20,986.36, 28,831.57 and 18,777.48 is: 25,796.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.36 : 28,831.57 = 18,777.48 : x
  2. Step 2: Convert to fraction form
    20,986.36/28,831.57 = 18,777.48/x
  3. Step 3: Cross multiply
    20,986.36x = 28,831.57 × 18,777.48
  4. Step 4: Simplify right side
    20,986.36x = 541,384,229.04
  5. Step 5: Solve for x
    x = 541,384,229.04/20,986.36
  6. Step 6: Final answer
    x = 25,796.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.