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Finding the Fourth Proportional to 13,871.44, 20,806.20 and 5,104.72

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Solution

The fourth proportional to 13,871.44, 20,806.20 and 5,104.72 is: 7,656.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,871.44 : 20,806.20 = 5,104.72 : x
  2. Step 2: Convert to fraction form
    13,871.44/20,806.20 = 5,104.72/x
  3. Step 3: Cross multiply
    13,871.44x = 20,806.20 × 5,104.72
  4. Step 4: Simplify right side
    13,871.44x = 106,209,825.26
  5. Step 5: Solve for x
    x = 106,209,825.26/13,871.44
  6. Step 6: Final answer
    x = 7,656.73

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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.