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Finding the Fourth Proportional to 18,391.92, 25,380.96 and 10,008.48

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Solution

The fourth proportional to 18,391.92, 25,380.96 and 10,008.48 is: 13,811.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,391.92 : 25,380.96 = 10,008.48 : x
  2. Step 2: Convert to fraction form
    18,391.92/25,380.96 = 10,008.48/x
  3. Step 3: Cross multiply
    18,391.92x = 25,380.96 × 10,008.48
  4. Step 4: Simplify right side
    18,391.92x = 254,024,830.54
  5. Step 5: Solve for x
    x = 254,024,830.54/18,391.92
  6. Step 6: Final answer
    x = 13,811.76

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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.