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Finding the Fourth Proportional to 18,151.70, 25,057.96 and 12,187.67

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Solution

The fourth proportional to 18,151.70, 25,057.96 and 12,187.67 is: 16,824.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,151.70 : 25,057.96 = 12,187.67 : x
  2. Step 2: Convert to fraction form
    18,151.70/25,057.96 = 12,187.67/x
  3. Step 3: Cross multiply
    18,151.70x = 25,057.96 × 12,187.67
  4. Step 4: Simplify right side
    18,151.70x = 305,397,991.59
  5. Step 5: Solve for x
    x = 305,397,991.59/18,151.70
  6. Step 6: Final answer
    x = 16,824.76

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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.