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Finding the Fourth Proportional to 17,912.84, 26,869.22 and 4,765.21

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Solution

The fourth proportional to 17,912.84, 26,869.22 and 4,765.21 is: 7,147.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,912.84 : 26,869.22 = 4,765.21 : x
  2. Step 2: Convert to fraction form
    17,912.84/26,869.22 = 4,765.21/x
  3. Step 3: Cross multiply
    17,912.84x = 26,869.22 × 4,765.21
  4. Step 4: Simplify right side
    17,912.84x = 128,037,371.62
  5. Step 5: Solve for x
    x = 128,037,371.62/17,912.84
  6. Step 6: Final answer
    x = 7,147.80

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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.