Home / 20,474.24-30,688.80-7,991.96

Finding the Fourth Proportional to 20,474.24, 30,688.80 and 7,991.96

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Solution

The fourth proportional to 20,474.24, 30,688.80 and 7,991.96 is: 11,979.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,474.24 : 30,688.80 = 7,991.96 : x
  2. Step 2: Convert to fraction form
    20,474.24/30,688.80 = 7,991.96/x
  3. Step 3: Cross multiply
    20,474.24x = 30,688.80 × 7,991.96
  4. Step 4: Simplify right side
    20,474.24x = 245,263,662.05
  5. Step 5: Solve for x
    x = 245,263,662.05/20,474.24
  6. Step 6: Final answer
    x = 11,979.13

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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.