Home / 30,481.11-45,721.68-12,938.64

Finding the Fourth Proportional to 30,481.11, 45,721.68 and 12,938.64

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Solution

The fourth proportional to 30,481.11, 45,721.68 and 12,938.64 is: 19,407.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,481.11 : 45,721.68 = 12,938.64 : x
  2. Step 2: Convert to fraction form
    30,481.11/45,721.68 = 12,938.64/x
  3. Step 3: Cross multiply
    30,481.11x = 45,721.68 × 12,938.64
  4. Step 4: Simplify right side
    30,481.11x = 591,576,357.72
  5. Step 5: Solve for x
    x = 591,576,357.72/30,481.11
  6. Step 6: Final answer
    x = 19,407.97

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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.