Home / 20,480.14-30,722.39-6,440.61

Finding the Fourth Proportional to 20,480.14, 30,722.39 and 6,440.61

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Solution

The fourth proportional to 20,480.14, 30,722.39 and 6,440.61 is: 9,661.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,480.14 : 30,722.39 = 6,440.61 : x
  2. Step 2: Convert to fraction form
    20,480.14/30,722.39 = 6,440.61/x
  3. Step 3: Cross multiply
    20,480.14x = 30,722.39 × 6,440.61
  4. Step 4: Simplify right side
    20,480.14x = 197,871,039.42
  5. Step 5: Solve for x
    x = 197,871,039.42/20,480.14
  6. Step 6: Final answer
    x = 9,661.61

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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.