Home / 13,078.89-18,096.38-11,403.79

Finding the Fourth Proportional to 13,078.89, 18,096.38 and 11,403.79

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Solution

The fourth proportional to 13,078.89, 18,096.38 and 11,403.79 is: 15,778.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,078.89 : 18,096.38 = 11,403.79 : x
  2. Step 2: Convert to fraction form
    13,078.89/18,096.38 = 11,403.79/x
  3. Step 3: Cross multiply
    13,078.89x = 18,096.38 × 11,403.79
  4. Step 4: Simplify right side
    13,078.89x = 206,367,317.28
  5. Step 5: Solve for x
    x = 206,367,317.28/13,078.89
  6. Step 6: Final answer
    x = 15,778.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.