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Finding the Fourth Proportional to 18,626.27, 27,939.41 and 5,478.64

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Solution

The fourth proportional to 18,626.27, 27,939.41 and 5,478.64 is: 8,217.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,626.27 : 27,939.41 = 5,478.64 : x
  2. Step 2: Convert to fraction form
    18,626.27/27,939.41 = 5,478.64/x
  3. Step 3: Cross multiply
    18,626.27x = 27,939.41 × 5,478.64
  4. Step 4: Simplify right side
    18,626.27x = 153,069,941.81
  5. Step 5: Solve for x
    x = 153,069,941.81/18,626.27
  6. Step 6: Final answer
    x = 8,217.96

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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.