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Finding the Fourth Proportional to 28,181, 38,892.62 and 15,605.75

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Solution

The fourth proportional to 28,181, 38,892.62 and 15,605.75 is: 21,537.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,181 : 38,892.62 = 15,605.75 : x
  2. Step 2: Convert to fraction form
    28,181/38,892.62 = 15,605.75/x
  3. Step 3: Cross multiply
    28,181x = 38,892.62 × 15,605.75
  4. Step 4: Simplify right side
    28,181x = 606,948,504.57
  5. Step 5: Solve for x
    x = 606,948,504.57/28,181
  6. Step 6: Final answer
    x = 21,537.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.