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Finding the Fourth Proportional to 18,909.92, 26,087.46 and 13,245.62

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Solution

The fourth proportional to 18,909.92, 26,087.46 and 13,245.62 is: 18,273.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,909.92 : 26,087.46 = 13,245.62 : x
  2. Step 2: Convert to fraction form
    18,909.92/26,087.46 = 13,245.62/x
  3. Step 3: Cross multiply
    18,909.92x = 26,087.46 × 13,245.62
  4. Step 4: Simplify right side
    18,909.92x = 345,544,581.93
  5. Step 5: Solve for x
    x = 345,544,581.93/18,909.92
  6. Step 6: Final answer
    x = 18,273.19

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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.