Home / 20,400.28-30,596.78-12,982.72

Finding the Fourth Proportional to 20,400.28, 30,596.78 and 12,982.72

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Solution

The fourth proportional to 20,400.28, 30,596.78 and 12,982.72 is: 19,471.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.28 : 30,596.78 = 12,982.72 : x
  2. Step 2: Convert to fraction form
    20,400.28/30,596.78 = 12,982.72/x
  3. Step 3: Cross multiply
    20,400.28x = 30,596.78 × 12,982.72
  4. Step 4: Simplify right side
    20,400.28x = 397,229,427.64
  5. Step 5: Solve for x
    x = 397,229,427.64/20,400.28
  6. Step 6: Final answer
    x = 19,471.76

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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.