Home / 20,629.76-30,944.64-12,419.84

Finding the Fourth Proportional to 20,629.76, 30,944.64 and 12,419.84

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Solution

The fourth proportional to 20,629.76, 30,944.64 and 12,419.84 is: 18,629.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,629.76 : 30,944.64 = 12,419.84 : x
  2. Step 2: Convert to fraction form
    20,629.76/30,944.64 = 12,419.84/x
  3. Step 3: Cross multiply
    20,629.76x = 30,944.64 × 12,419.84
  4. Step 4: Simplify right side
    20,629.76x = 384,327,477.66
  5. Step 5: Solve for x
    x = 384,327,477.66/20,629.76
  6. Step 6: Final answer
    x = 18,629.76

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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.