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Finding the Fourth Proportional to 18,873.52, 28,314.44 and 7,186.80

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Solution

The fourth proportional to 18,873.52, 28,314.44 and 7,186.80 is: 10,781.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,873.52 : 28,314.44 = 7,186.80 : x
  2. Step 2: Convert to fraction form
    18,873.52/28,314.44 = 7,186.80/x
  3. Step 3: Cross multiply
    18,873.52x = 28,314.44 × 7,186.80
  4. Step 4: Simplify right side
    18,873.52x = 203,490,217.39
  5. Step 5: Solve for x
    x = 203,490,217.39/18,873.52
  6. Step 6: Final answer
    x = 10,781.78

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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.