Home / 12,910.42-17,785.68-12,135.25

Finding the Fourth Proportional to 12,910.42, 17,785.68 and 12,135.25

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Solution

The fourth proportional to 12,910.42, 17,785.68 and 12,135.25 is: 16,717.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,910.42 : 17,785.68 = 12,135.25 : x
  2. Step 2: Convert to fraction form
    12,910.42/17,785.68 = 12,135.25/x
  3. Step 3: Cross multiply
    12,910.42x = 17,785.68 × 12,135.25
  4. Step 4: Simplify right side
    12,910.42x = 215,833,673.22
  5. Step 5: Solve for x
    x = 215,833,673.22/12,910.42
  6. Step 6: Final answer
    x = 16,717.79

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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.