Home / 20,831.72-28,747.66-11,271.59

Finding the Fourth Proportional to 20,831.72, 28,747.66 and 11,271.59

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Solution

The fourth proportional to 20,831.72, 28,747.66 and 11,271.59 is: 15,554.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.72 : 28,747.66 = 11,271.59 : x
  2. Step 2: Convert to fraction form
    20,831.72/28,747.66 = 11,271.59/x
  3. Step 3: Cross multiply
    20,831.72x = 28,747.66 × 11,271.59
  4. Step 4: Simplify right side
    20,831.72x = 324,031,836.98
  5. Step 5: Solve for x
    x = 324,031,836.98/20,831.72
  6. Step 6: Final answer
    x = 15,554.73

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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.