Home / 13,339.20-18,408.60-7,371.12

Finding the Fourth Proportional to 13,339.20, 18,408.60 and 7,371.12

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Solution

The fourth proportional to 13,339.20, 18,408.60 and 7,371.12 is: 10,172.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,339.20 : 18,408.60 = 7,371.12 : x
  2. Step 2: Convert to fraction form
    13,339.20/18,408.60 = 7,371.12/x
  3. Step 3: Cross multiply
    13,339.20x = 18,408.60 × 7,371.12
  4. Step 4: Simplify right side
    13,339.20x = 135,691,999.63
  5. Step 5: Solve for x
    x = 135,691,999.63/13,339.20
  6. Step 6: Final answer
    x = 10,172.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.