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Finding the Fourth Proportional to 18,705.27, 28,061.28 and 5,377.62

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Solution

The fourth proportional to 18,705.27, 28,061.28 and 5,377.62 is: 8,067.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,705.27 : 28,061.28 = 5,377.62 : x
  2. Step 2: Convert to fraction form
    18,705.27/28,061.28 = 5,377.62/x
  3. Step 3: Cross multiply
    18,705.27x = 28,061.28 × 5,377.62
  4. Step 4: Simplify right side
    18,705.27x = 150,902,900.55
  5. Step 5: Solve for x
    x = 150,902,900.55/18,705.27
  6. Step 6: Final answer
    x = 8,067.40

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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.