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Finding the Fourth Proportional to 18,850.60, 25,995.66 and 12,138.16

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Solution

The fourth proportional to 18,850.60, 25,995.66 and 12,138.16 is: 16,738.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,850.60 : 25,995.66 = 12,138.16 : x
  2. Step 2: Convert to fraction form
    18,850.60/25,995.66 = 12,138.16/x
  3. Step 3: Cross multiply
    18,850.60x = 25,995.66 × 12,138.16
  4. Step 4: Simplify right side
    18,850.60x = 315,539,480.39
  5. Step 5: Solve for x
    x = 315,539,480.39/18,850.60
  6. Step 6: Final answer
    x = 16,738.96

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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.