Home / 20,831.40-31,249.68-6,792.84

Finding the Fourth Proportional to 20,831.40, 31,249.68 and 6,792.84

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Solution

The fourth proportional to 20,831.40, 31,249.68 and 6,792.84 is: 10,190.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.40 : 31,249.68 = 6,792.84 : x
  2. Step 2: Convert to fraction form
    20,831.40/31,249.68 = 6,792.84/x
  3. Step 3: Cross multiply
    20,831.40x = 31,249.68 × 6,792.84
  4. Step 4: Simplify right side
    20,831.40x = 212,273,920.04
  5. Step 5: Solve for x
    x = 212,273,920.04/20,831.40
  6. Step 6: Final answer
    x = 10,190.10

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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.