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Finding the Fourth Proportional to 18,240.87, 27,361.29 and 4,389.87

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Solution

The fourth proportional to 18,240.87, 27,361.29 and 4,389.87 is: 6,584.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,240.87 : 27,361.29 = 4,389.87 : x
  2. Step 2: Convert to fraction form
    18,240.87/27,361.29 = 4,389.87/x
  3. Step 3: Cross multiply
    18,240.87x = 27,361.29 × 4,389.87
  4. Step 4: Simplify right side
    18,240.87x = 120,112,506.13
  5. Step 5: Solve for x
    x = 120,112,506.13/18,240.87
  6. Step 6: Final answer
    x = 6,584.80

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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.