Home / 20,808.96-28,716.34-11,856.46

Finding the Fourth Proportional to 20,808.96, 28,716.34 and 11,856.46

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Solution

The fourth proportional to 20,808.96, 28,716.34 and 11,856.46 is: 16,361.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.96 : 28,716.34 = 11,856.46 : x
  2. Step 2: Convert to fraction form
    20,808.96/28,716.34 = 11,856.46/x
  3. Step 3: Cross multiply
    20,808.96x = 28,716.34 × 11,856.46
  4. Step 4: Simplify right side
    20,808.96x = 340,474,136.56
  5. Step 5: Solve for x
    x = 340,474,136.56/20,808.96
  6. Step 6: Final answer
    x = 16,361.90

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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.