Home / 20,580.50-30,831.31-12,235.25

Finding the Fourth Proportional to 20,580.50, 30,831.31 and 12,235.25

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Solution

The fourth proportional to 20,580.50, 30,831.31 and 12,235.25 is: 18,329.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.50 : 30,831.31 = 12,235.25 : x
  2. Step 2: Convert to fraction form
    20,580.50/30,831.31 = 12,235.25/x
  3. Step 3: Cross multiply
    20,580.50x = 30,831.31 × 12,235.25
  4. Step 4: Simplify right side
    20,580.50x = 377,228,785.68
  5. Step 5: Solve for x
    x = 377,228,785.68/20,580.50
  6. Step 6: Final answer
    x = 18,329.43

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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.