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Finding the Fourth Proportional to 18,683.70, 27,942.93 and 16,618.20

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Solution

The fourth proportional to 18,683.70, 27,942.93 and 16,618.20 is: 24,853.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,683.70 : 27,942.93 = 16,618.20 : x
  2. Step 2: Convert to fraction form
    18,683.70/27,942.93 = 16,618.20/x
  3. Step 3: Cross multiply
    18,683.70x = 27,942.93 × 16,618.20
  4. Step 4: Simplify right side
    18,683.70x = 464,361,199.33
  5. Step 5: Solve for x
    x = 464,361,199.33/18,683.70
  6. Step 6: Final answer
    x = 24,853.81

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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.