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Finding the Fourth Proportional to 18,379.20, 25,363.50 and 10,314.63

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Solution

The fourth proportional to 18,379.20, 25,363.50 and 10,314.63 is: 14,234.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,379.20 : 25,363.50 = 10,314.63 : x
  2. Step 2: Convert to fraction form
    18,379.20/25,363.50 = 10,314.63/x
  3. Step 3: Cross multiply
    18,379.20x = 25,363.50 × 10,314.63
  4. Step 4: Simplify right side
    18,379.20x = 261,615,251.80
  5. Step 5: Solve for x
    x = 261,615,251.80/18,379.20
  6. Step 6: Final answer
    x = 14,234.31

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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.