Home / 12,780.75-19,171.13-3,546.75

Finding the Fourth Proportional to 12,780.75, 19,171.13 and 3,546.75

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Solution

The fourth proportional to 12,780.75, 19,171.13 and 3,546.75 is: 5,320.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.75 : 19,171.13 = 3,546.75 : x
  2. Step 2: Convert to fraction form
    12,780.75/19,171.13 = 3,546.75/x
  3. Step 3: Cross multiply
    12,780.75x = 19,171.13 × 3,546.75
  4. Step 4: Simplify right side
    12,780.75x = 67,995,205.33
  5. Step 5: Solve for x
    x = 67,995,205.33/12,780.75
  6. Step 6: Final answer
    x = 5,320.13

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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.