Home / 31,371.90-47,028.97-13,591.39

Finding the Fourth Proportional to 31,371.90, 47,028.97 and 13,591.39

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Solution

The fourth proportional to 31,371.90, 47,028.97 and 13,591.39 is: 20,374.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,371.90 : 47,028.97 = 13,591.39 : x
  2. Step 2: Convert to fraction form
    31,371.90/47,028.97 = 13,591.39/x
  3. Step 3: Cross multiply
    31,371.90x = 47,028.97 × 13,591.39
  4. Step 4: Simplify right side
    31,371.90x = 639,189,072.57
  5. Step 5: Solve for x
    x = 639,189,072.57/31,371.90
  6. Step 6: Final answer
    x = 20,374.57

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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.