Home / 20,801.22-28,708.66-12,310.80

Finding the Fourth Proportional to 20,801.22, 28,708.66 and 12,310.80

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Solution

The fourth proportional to 20,801.22, 28,708.66 and 12,310.80 is: 16,990.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.22 : 28,708.66 = 12,310.80 : x
  2. Step 2: Convert to fraction form
    20,801.22/28,708.66 = 12,310.80/x
  3. Step 3: Cross multiply
    20,801.22x = 28,708.66 × 12,310.80
  4. Step 4: Simplify right side
    20,801.22x = 353,426,571.53
  5. Step 5: Solve for x
    x = 353,426,571.53/20,801.22
  6. Step 6: Final answer
    x = 16,990.67

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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.