Home / 13,339.75-18,408.78-7,371.42

Finding the Fourth Proportional to 13,339.75, 18,408.78 and 7,371.42

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Solution

The fourth proportional to 13,339.75, 18,408.78 and 7,371.42 is: 10,172.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,339.75 : 18,408.78 = 7,371.42 : x
  2. Step 2: Convert to fraction form
    13,339.75/18,408.78 = 7,371.42/x
  3. Step 3: Cross multiply
    13,339.75x = 18,408.78 × 7,371.42
  4. Step 4: Simplify right side
    13,339.75x = 135,698,849.07
  5. Step 5: Solve for x
    x = 135,698,849.07/13,339.75
  6. Step 6: Final answer
    x = 10,172.52

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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.