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Finding the Fourth Proportional to 38,813, 58,228.12 and 21,273.80

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Solution

The fourth proportional to 38,813, 58,228.12 and 21,273.80 is: 31,915.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,813 : 58,228.12 = 21,273.80 : x
  2. Step 2: Convert to fraction form
    38,813/58,228.12 = 21,273.80/x
  3. Step 3: Cross multiply
    38,813x = 58,228.12 × 21,273.80
  4. Step 4: Simplify right side
    38,813x = 1,238,733,379.26
  5. Step 5: Solve for x
    x = 1,238,733,379.26/38,813
  6. Step 6: Final answer
    x = 31,915.42

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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.