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Finding the Fourth Proportional to 18,873.15, 28,269.42 and 14,380.89

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Solution

The fourth proportional to 18,873.15, 28,269.42 and 14,380.89 is: 21,540.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,873.15 : 28,269.42 = 14,380.89 : x
  2. Step 2: Convert to fraction form
    18,873.15/28,269.42 = 14,380.89/x
  3. Step 3: Cross multiply
    18,873.15x = 28,269.42 × 14,380.89
  4. Step 4: Simplify right side
    18,873.15x = 406,539,419.38
  5. Step 5: Solve for x
    x = 406,539,419.38/18,873.15
  6. Step 6: Final answer
    x = 21,540.62

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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.