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Finding the Fourth Proportional to 18,657.60, 27,992.80 and 8,276.80

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Solution

The fourth proportional to 18,657.60, 27,992.80 and 8,276.80 is: 12,418.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,657.60 : 27,992.80 = 8,276.80 : x
  2. Step 2: Convert to fraction form
    18,657.60/27,992.80 = 8,276.80/x
  3. Step 3: Cross multiply
    18,657.60x = 27,992.80 × 8,276.80
  4. Step 4: Simplify right side
    18,657.60x = 231,690,807.04
  5. Step 5: Solve for x
    x = 231,690,807.04/18,657.60
  6. Step 6: Final answer
    x = 12,418.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.