Home / 20,831.05-31,249.54-7,682.40

Finding the Fourth Proportional to 20,831.05, 31,249.54 and 7,682.40

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Solution

The fourth proportional to 20,831.05, 31,249.54 and 7,682.40 is: 11,524.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.05 : 31,249.54 = 7,682.40 : x
  2. Step 2: Convert to fraction form
    20,831.05/31,249.54 = 7,682.40/x
  3. Step 3: Cross multiply
    20,831.05x = 31,249.54 × 7,682.40
  4. Step 4: Simplify right side
    20,831.05x = 240,071,427.68
  5. Step 5: Solve for x
    x = 240,071,427.68/20,831.05
  6. Step 6: Final answer
    x = 11,524.69

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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.