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Finding the Fourth Proportional to 18,612.62, 25,687 and 10,230.86

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Solution

The fourth proportional to 18,612.62, 25,687 and 10,230.86 is: 14,119.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,612.62 : 25,687 = 10,230.86 : x
  2. Step 2: Convert to fraction form
    18,612.62/25,687 = 10,230.86/x
  3. Step 3: Cross multiply
    18,612.62x = 25,687 × 10,230.86
  4. Step 4: Simplify right side
    18,612.62x = 262,800,100.82
  5. Step 5: Solve for x
    x = 262,800,100.82/18,612.62
  6. Step 6: Final answer
    x = 14,119.46

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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.