Home / 13,938.40-20,907.22-3,408.48

Finding the Fourth Proportional to 13,938.40, 20,907.22 and 3,408.48

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Solution

The fourth proportional to 13,938.40, 20,907.22 and 3,408.48 is: 5,112.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.40 : 20,907.22 = 3,408.48 : x
  2. Step 2: Convert to fraction form
    13,938.40/20,907.22 = 3,408.48/x
  3. Step 3: Cross multiply
    13,938.40x = 20,907.22 × 3,408.48
  4. Step 4: Simplify right side
    13,938.40x = 71,261,841.23
  5. Step 5: Solve for x
    x = 71,261,841.23/13,938.40
  6. Step 6: Final answer
    x = 5,112.63

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1.5x scale

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.