Home / 12,936.90-19,405.76-4,171.89

Finding the Fourth Proportional to 12,936.90, 19,405.76 and 4,171.89

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Solution

The fourth proportional to 12,936.90, 19,405.76 and 4,171.89 is: 6,257.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,936.90 : 19,405.76 = 4,171.89 : x
  2. Step 2: Convert to fraction form
    12,936.90/19,405.76 = 4,171.89/x
  3. Step 3: Cross multiply
    12,936.90x = 19,405.76 × 4,171.89
  4. Step 4: Simplify right side
    12,936.90x = 80,958,675.23
  5. Step 5: Solve for x
    x = 80,958,675.23/12,936.90
  6. Step 6: Final answer
    x = 6,257.97

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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.