Home / 13,218.72-19,831.44-3,984.48

Finding the Fourth Proportional to 13,218.72, 19,831.44 and 3,984.48

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Solution

The fourth proportional to 13,218.72, 19,831.44 and 3,984.48 is: 5,977.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218.72 : 19,831.44 = 3,984.48 : x
  2. Step 2: Convert to fraction form
    13,218.72/19,831.44 = 3,984.48/x
  3. Step 3: Cross multiply
    13,218.72x = 19,831.44 × 3,984.48
  4. Step 4: Simplify right side
    13,218.72x = 79,017,976.05
  5. Step 5: Solve for x
    x = 79,017,976.05/13,218.72
  6. Step 6: Final answer
    x = 5,977.73

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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.