Home / 12,408.78-17,122.68-7,103.28

Finding the Fourth Proportional to 12,408.78, 17,122.68 and 7,103.28

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Solution

The fourth proportional to 12,408.78, 17,122.68 and 7,103.28 is: 9,801.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,408.78 : 17,122.68 = 7,103.28 : x
  2. Step 2: Convert to fraction form
    12,408.78/17,122.68 = 7,103.28/x
  3. Step 3: Cross multiply
    12,408.78x = 17,122.68 × 7,103.28
  4. Step 4: Simplify right side
    12,408.78x = 121,627,190.39
  5. Step 5: Solve for x
    x = 121,627,190.39/12,408.78
  6. Step 6: Final answer
    x = 9,801.70

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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.