Home / 13,120.96-19,682.16-3,887.68

Finding the Fourth Proportional to 13,120.96, 19,682.16 and 3,887.68

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Solution

The fourth proportional to 13,120.96, 19,682.16 and 3,887.68 is: 5,831.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.96 : 19,682.16 = 3,887.68 : x
  2. Step 2: Convert to fraction form
    13,120.96/19,682.16 = 3,887.68/x
  3. Step 3: Cross multiply
    13,120.96x = 19,682.16 × 3,887.68
  4. Step 4: Simplify right side
    13,120.96x = 76,517,939.79
  5. Step 5: Solve for x
    x = 76,517,939.79/13,120.96
  6. Step 6: Final answer
    x = 5,831.73

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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.