Home / 18,781.35-25,935.83-12,078.62

Finding the Fourth Proportional to 18,781.35, 25,935.83 and 12,078.62

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Solution

The fourth proportional to 18,781.35, 25,935.83 and 12,078.62 is: 16,679.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,781.35 : 25,935.83 = 12,078.62 : x
  2. Step 2: Convert to fraction form
    18,781.35/25,935.83 = 12,078.62/x
  3. Step 3: Cross multiply
    18,781.35x = 25,935.83 × 12,078.62
  4. Step 4: Simplify right side
    18,781.35x = 313,269,034.95
  5. Step 5: Solve for x
    x = 313,269,034.95/18,781.35
  6. Step 6: Final answer
    x = 16,679.79

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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.