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Finding the Fourth Proportional to 12,671.40, 17,469.90 and 9,135.48

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Solution

The fourth proportional to 12,671.40, 17,469.90 and 9,135.48 is: 12,594.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,671.40 : 17,469.90 = 9,135.48 : x
  2. Step 2: Convert to fraction form
    12,671.40/17,469.90 = 9,135.48/x
  3. Step 3: Cross multiply
    12,671.40x = 17,469.90 × 9,135.48
  4. Step 4: Simplify right side
    12,671.40x = 159,595,922.05
  5. Step 5: Solve for x
    x = 159,595,922.05/12,671.40
  6. Step 6: Final answer
    x = 12,594.97

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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.