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Finding the Fourth Proportional to 18,391.88, 25,380.05 and 10,433.95

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Solution

The fourth proportional to 18,391.88, 25,380.05 and 10,433.95 is: 14,398.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,391.88 : 25,380.05 = 10,433.95 : x
  2. Step 2: Convert to fraction form
    18,391.88/25,380.05 = 10,433.95/x
  3. Step 3: Cross multiply
    18,391.88x = 25,380.05 × 10,433.95
  4. Step 4: Simplify right side
    18,391.88x = 264,814,057.08
  5. Step 5: Solve for x
    x = 264,814,057.08/18,391.88
  6. Step 6: Final answer
    x = 14,398.42

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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.