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Finding the Fourth Proportional to 17,376.60, 23,979.74 and 9,418.80

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Solution

The fourth proportional to 17,376.60, 23,979.74 and 9,418.80 is: 12,997.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,376.60 : 23,979.74 = 9,418.80 : x
  2. Step 2: Convert to fraction form
    17,376.60/23,979.74 = 9,418.80/x
  3. Step 3: Cross multiply
    17,376.60x = 23,979.74 × 9,418.80
  4. Step 4: Simplify right side
    17,376.60x = 225,860,375.11
  5. Step 5: Solve for x
    x = 225,860,375.11/17,376.60
  6. Step 6: Final answer
    x = 12,997.96

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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.