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Finding the Fourth Proportional to 18,728.72, 25,845.67 and 10,230.90

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Solution

The fourth proportional to 18,728.72, 25,845.67 and 10,230.90 is: 14,118.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,728.72 : 25,845.67 = 10,230.90 : x
  2. Step 2: Convert to fraction form
    18,728.72/25,845.67 = 10,230.90/x
  3. Step 3: Cross multiply
    18,728.72x = 25,845.67 × 10,230.90
  4. Step 4: Simplify right side
    18,728.72x = 264,424,414.05
  5. Step 5: Solve for x
    x = 264,424,414.05/18,728.72
  6. Step 6: Final answer
    x = 14,118.66

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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.