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Finding the Fourth Proportional to 18,654.96, 28,008.36 and 10,861.68

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Solution

The fourth proportional to 18,654.96, 28,008.36 and 10,861.68 is: 16,307.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,654.96 : 28,008.36 = 10,861.68 : x
  2. Step 2: Convert to fraction form
    18,654.96/28,008.36 = 10,861.68/x
  3. Step 3: Cross multiply
    18,654.96x = 28,008.36 × 10,861.68
  4. Step 4: Simplify right side
    18,654.96x = 304,217,843.64
  5. Step 5: Solve for x
    x = 304,217,843.64/18,654.96
  6. Step 6: Final answer
    x = 16,307.61

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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.