Home / 13,938.30-20,907.45-5,171.47

Finding the Fourth Proportional to 13,938.30, 20,907.45 and 5,171.47

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Solution

The fourth proportional to 13,938.30, 20,907.45 and 5,171.47 is: 7,757.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.30 : 20,907.45 = 5,171.47 : x
  2. Step 2: Convert to fraction form
    13,938.30/20,907.45 = 5,171.47/x
  3. Step 3: Cross multiply
    13,938.30x = 20,907.45 × 5,171.47
  4. Step 4: Simplify right side
    13,938.30x = 108,122,198.18
  5. Step 5: Solve for x
    x = 108,122,198.18/13,938.30
  6. Step 6: Final answer
    x = 7,757.20

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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.