Home / 13,945.20-20,917.80-3,556.95

Finding the Fourth Proportional to 13,945.20, 20,917.80 and 3,556.95

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Solution

The fourth proportional to 13,945.20, 20,917.80 and 3,556.95 is: 5,335.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,945.20 : 20,917.80 = 3,556.95 : x
  2. Step 2: Convert to fraction form
    13,945.20/20,917.80 = 3,556.95/x
  3. Step 3: Cross multiply
    13,945.20x = 20,917.80 × 3,556.95
  4. Step 4: Simplify right side
    13,945.20x = 74,403,568.71
  5. Step 5: Solve for x
    x = 74,403,568.71/13,945.20
  6. Step 6: Final answer
    x = 5,335.43

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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.