Home / 20,831.80-28,747.74-11,271.64

Finding the Fourth Proportional to 20,831.80, 28,747.74 and 11,271.64

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Solution

The fourth proportional to 20,831.80, 28,747.74 and 11,271.64 is: 15,554.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.80 : 28,747.74 = 11,271.64 : x
  2. Step 2: Convert to fraction form
    20,831.80/28,747.74 = 11,271.64/x
  3. Step 3: Cross multiply
    20,831.80x = 28,747.74 × 11,271.64
  4. Step 4: Simplify right side
    20,831.80x = 324,034,176.09
  5. Step 5: Solve for x
    x = 324,034,176.09/20,831.80
  6. Step 6: Final answer
    x = 15,554.79

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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.