Home / 12,910.39-19,329.09-8,218.78

Finding the Fourth Proportional to 12,910.39, 19,329.09 and 8,218.78

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Solution

The fourth proportional to 12,910.39, 19,329.09 and 8,218.78 is: 12,304.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,910.39 : 19,329.09 = 8,218.78 : x
  2. Step 2: Convert to fraction form
    12,910.39/19,329.09 = 8,218.78/x
  3. Step 3: Cross multiply
    12,910.39x = 19,329.09 × 8,218.78
  4. Step 4: Simplify right side
    12,910.39x = 158,861,538.31
  5. Step 5: Solve for x
    x = 158,861,538.31/12,910.39
  6. Step 6: Final answer
    x = 12,304.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.