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Finding the Fourth Proportional to 12,408.80, 17,105.99 and 10,167.12

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Solution

The fourth proportional to 12,408.80, 17,105.99 and 10,167.12 is: 14,015.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,408.80 : 17,105.99 = 10,167.12 : x
  2. Step 2: Convert to fraction form
    12,408.80/17,105.99 = 10,167.12/x
  3. Step 3: Cross multiply
    12,408.80x = 17,105.99 × 10,167.12
  4. Step 4: Simplify right side
    12,408.80x = 173,918,602.21
  5. Step 5: Solve for x
    x = 173,918,602.21/12,408.80
  6. Step 6: Final answer
    x = 14,015.75

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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.