Home / 20,867.21-31,290.92-12,104.81

Finding the Fourth Proportional to 20,867.21, 31,290.92 and 12,104.81

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Solution

The fourth proportional to 20,867.21, 31,290.92 and 12,104.81 is: 18,151.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.21 : 31,290.92 = 12,104.81 : x
  2. Step 2: Convert to fraction form
    20,867.21/31,290.92 = 12,104.81/x
  3. Step 3: Cross multiply
    20,867.21x = 31,290.92 × 12,104.81
  4. Step 4: Simplify right side
    20,867.21x = 378,770,580.80
  5. Step 5: Solve for x
    x = 378,770,580.80/20,867.21
  6. Step 6: Final answer
    x = 18,151.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.