Home / 3,887.20-5,831.66-1,421.96

Finding the Fourth Proportional to 3,887.20, 5,831.66 and 1,421.96

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Solution

The fourth proportional to 3,887.20, 5,831.66 and 1,421.96 is: 2,133.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,887.20 : 5,831.66 = 1,421.96 : x
  2. Step 2: Convert to fraction form
    3,887.20/5,831.66 = 1,421.96/x
  3. Step 3: Cross multiply
    3,887.20x = 5,831.66 × 1,421.96
  4. Step 4: Simplify right side
    3,887.20x = 8,292,405.39
  5. Step 5: Solve for x
    x = 8,292,405.39/3,887.20
  6. Step 6: Final answer
    x = 2,133.26

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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.