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Finding the Fourth Proportional to 18,479.53, 27,723.90 and 5,331.90

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Solution

The fourth proportional to 18,479.53, 27,723.90 and 5,331.90 is: 7,999.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,479.53 : 27,723.90 = 5,331.90 : x
  2. Step 2: Convert to fraction form
    18,479.53/27,723.90 = 5,331.90/x
  3. Step 3: Cross multiply
    18,479.53x = 27,723.90 × 5,331.90
  4. Step 4: Simplify right side
    18,479.53x = 147,821,062.41
  5. Step 5: Solve for x
    x = 147,821,062.41/18,479.53
  6. Step 6: Final answer
    x = 7,999.18

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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.