Home / 13,383.88-18,470.44-8,078.62

Finding the Fourth Proportional to 13,383.88, 18,470.44 and 8,078.62

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Solution

The fourth proportional to 13,383.88, 18,470.44 and 8,078.62 is: 11,148.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,383.88 : 18,470.44 = 8,078.62 : x
  2. Step 2: Convert to fraction form
    13,383.88/18,470.44 = 8,078.62/x
  3. Step 3: Cross multiply
    13,383.88x = 18,470.44 × 8,078.62
  4. Step 4: Simplify right side
    13,383.88x = 149,215,665.99
  5. Step 5: Solve for x
    x = 149,215,665.99/13,383.88
  6. Step 6: Final answer
    x = 11,148.91

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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.