Home / 5,131.80-7,688.79-2,662.92

Finding the Fourth Proportional to 5,131.80, 7,688.79 and 2,662.92

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Solution

The fourth proportional to 5,131.80, 7,688.79 and 2,662.92 is: 3,989.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,131.80 : 7,688.79 = 2,662.92 : x
  2. Step 2: Convert to fraction form
    5,131.80/7,688.79 = 2,662.92/x
  3. Step 3: Cross multiply
    5,131.80x = 7,688.79 × 2,662.92
  4. Step 4: Simplify right side
    5,131.80x = 20,474,632.67
  5. Step 5: Solve for x
    x = 20,474,632.67/5,131.80
  6. Step 6: Final answer
    x = 3,989.76

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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.