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Finding the Fourth Proportional to 18,679.72, 28,013.46 and 14,524.42

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Solution

The fourth proportional to 18,679.72, 28,013.46 and 14,524.42 is: 21,781.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,679.72 : 28,013.46 = 14,524.42 : x
  2. Step 2: Convert to fraction form
    18,679.72/28,013.46 = 14,524.42/x
  3. Step 3: Cross multiply
    18,679.72x = 28,013.46 × 14,524.42
  4. Step 4: Simplify right side
    18,679.72x = 406,879,258.69
  5. Step 5: Solve for x
    x = 406,879,258.69/18,679.72
  6. Step 6: Final answer
    x = 21,781.87

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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.