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Finding the Fourth Proportional to 18,802.27, 28,173.74 and 6,939.72

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Solution

The fourth proportional to 18,802.27, 28,173.74 and 6,939.72 is: 10,398.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,802.27 : 28,173.74 = 6,939.72 : x
  2. Step 2: Convert to fraction form
    18,802.27/28,173.74 = 6,939.72/x
  3. Step 3: Cross multiply
    18,802.27x = 28,173.74 × 6,939.72
  4. Step 4: Simplify right side
    18,802.27x = 195,517,691.39
  5. Step 5: Solve for x
    x = 195,517,691.39/18,802.27
  6. Step 6: Final answer
    x = 10,398.62

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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.