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Finding the Fourth Proportional to 18,104.91, 24,990.89 and 11,401.75

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Solution

The fourth proportional to 18,104.91, 24,990.89 and 11,401.75 is: 15,738.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,104.91 : 24,990.89 = 11,401.75 : x
  2. Step 2: Convert to fraction form
    18,104.91/24,990.89 = 11,401.75/x
  3. Step 3: Cross multiply
    18,104.91x = 24,990.89 × 11,401.75
  4. Step 4: Simplify right side
    18,104.91x = 284,939,880.06
  5. Step 5: Solve for x
    x = 284,939,880.06/18,104.91
  6. Step 6: Final answer
    x = 15,738.27

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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.