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Finding the Fourth Proportional to 38,407.87, 57,815.62 and 27,390.79

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Solution

The fourth proportional to 38,407.87, 57,815.62 and 27,390.79 is: 41,231.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,407.87 : 57,815.62 = 27,390.79 : x
  2. Step 2: Convert to fraction form
    38,407.87/57,815.62 = 27,390.79/x
  3. Step 3: Cross multiply
    38,407.87x = 57,815.62 × 27,390.79
  4. Step 4: Simplify right side
    38,407.87x = 1,583,615,506.14
  5. Step 5: Solve for x
    x = 1,583,615,506.14/38,407.87
  6. Step 6: Final answer
    x = 41,231.54

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.