Home / 13,339.40-18,408.72-7,371.44

Finding the Fourth Proportional to 13,339.40, 18,408.72 and 7,371.44

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Solution

The fourth proportional to 13,339.40, 18,408.72 and 7,371.44 is: 10,172.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,339.40 : 18,408.72 = 7,371.44 : x
  2. Step 2: Convert to fraction form
    13,339.40/18,408.72 = 7,371.44/x
  3. Step 3: Cross multiply
    13,339.40x = 18,408.72 × 7,371.44
  4. Step 4: Simplify right side
    13,339.40x = 135,698,682.91
  5. Step 5: Solve for x
    x = 135,698,682.91/13,339.40
  6. Step 6: Final answer
    x = 10,172.78

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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.