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Finding the Fourth Proportional to 18,903.25, 26,086.50 and 10,945.90

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Solution

The fourth proportional to 18,903.25, 26,086.50 and 10,945.90 is: 15,105.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,903.25 : 26,086.50 = 10,945.90 : x
  2. Step 2: Convert to fraction form
    18,903.25/26,086.50 = 10,945.90/x
  3. Step 3: Cross multiply
    18,903.25x = 26,086.50 × 10,945.90
  4. Step 4: Simplify right side
    18,903.25x = 285,540,220.35
  5. Step 5: Solve for x
    x = 285,540,220.35/18,903.25
  6. Step 6: Final answer
    x = 15,105.35

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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.