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Finding the Fourth Proportional to 13,806.90, 20,713.80 and 4,447.80

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Solution

The fourth proportional to 13,806.90, 20,713.80 and 4,447.80 is: 6,672.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,806.90 : 20,713.80 = 4,447.80 : x
  2. Step 2: Convert to fraction form
    13,806.90/20,713.80 = 4,447.80/x
  3. Step 3: Cross multiply
    13,806.90x = 20,713.80 × 4,447.80
  4. Step 4: Simplify right side
    13,806.90x = 92,130,839.64
  5. Step 5: Solve for x
    x = 92,130,839.64/13,806.90
  6. Step 6: Final answer
    x = 6,672.81

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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.