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Finding the Fourth Proportional to 18,596.40, 25,651.80 and 12,310.80

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Solution

The fourth proportional to 18,596.40, 25,651.80 and 12,310.80 is: 16,981.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,596.40 : 25,651.80 = 12,310.80 : x
  2. Step 2: Convert to fraction form
    18,596.40/25,651.80 = 12,310.80/x
  3. Step 3: Cross multiply
    18,596.40x = 25,651.80 × 12,310.80
  4. Step 4: Simplify right side
    18,596.40x = 315,794,179.44
  5. Step 5: Solve for x
    x = 315,794,179.44/18,596.40
  6. Step 6: Final answer
    x = 16,981.47

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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.