Home / 20,831.45-31,250.42-6,788.21

Finding the Fourth Proportional to 20,831.45, 31,250.42 and 6,788.21

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Solution

The fourth proportional to 20,831.45, 31,250.42 and 6,788.21 is: 10,183.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.45 : 31,250.42 = 6,788.21 : x
  2. Step 2: Convert to fraction form
    20,831.45/31,250.42 = 6,788.21/x
  3. Step 3: Cross multiply
    20,831.45x = 31,250.42 × 6,788.21
  4. Step 4: Simplify right side
    20,831.45x = 212,134,223.36
  5. Step 5: Solve for x
    x = 212,134,223.36/20,831.45
  6. Step 6: Final answer
    x = 10,183.37

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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.