Home / 20,171.30-27,831.80-12,211.83

Finding the Fourth Proportional to 20,171.30, 27,831.80 and 12,211.83

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Solution

The fourth proportional to 20,171.30, 27,831.80 and 12,211.83 is: 16,849.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,171.30 : 27,831.80 = 12,211.83 : x
  2. Step 2: Convert to fraction form
    20,171.30/27,831.80 = 12,211.83/x
  3. Step 3: Cross multiply
    20,171.30x = 27,831.80 × 12,211.83
  4. Step 4: Simplify right side
    20,171.30x = 339,877,240.72
  5. Step 5: Solve for x
    x = 339,877,240.72/20,171.30
  6. Step 6: Final answer
    x = 16,849.55

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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.