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Finding the Fourth Proportional to 13,906.68, 20,860.11 and 3,518.46

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Solution

The fourth proportional to 13,906.68, 20,860.11 and 3,518.46 is: 5,277.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,906.68 : 20,860.11 = 3,518.46 : x
  2. Step 2: Convert to fraction form
    13,906.68/20,860.11 = 3,518.46/x
  3. Step 3: Cross multiply
    13,906.68x = 20,860.11 × 3,518.46
  4. Step 4: Simplify right side
    13,906.68x = 73,395,462.63
  5. Step 5: Solve for x
    x = 73,395,462.63/13,906.68
  6. Step 6: Final answer
    x = 5,277.71

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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.