Home / 18,781.10-25,935.48-12,078.37

Finding the Fourth Proportional to 18,781.10, 25,935.48 and 12,078.37

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Solution

The fourth proportional to 18,781.10, 25,935.48 and 12,078.37 is: 16,679.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,781.10 : 25,935.48 = 12,078.37 : x
  2. Step 2: Convert to fraction form
    18,781.10/25,935.48 = 12,078.37/x
  3. Step 3: Cross multiply
    18,781.10x = 25,935.48 × 12,078.37
  4. Step 4: Simplify right side
    18,781.10x = 313,258,258.73
  5. Step 5: Solve for x
    x = 313,258,258.73/18,781.10
  6. Step 6: Final answer
    x = 16,679.44

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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.