Home / 12,939.75-19,405.98-4,173.53

Finding the Fourth Proportional to 12,939.75, 19,405.98 and 4,173.53

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Solution

The fourth proportional to 12,939.75, 19,405.98 and 4,173.53 is: 6,259.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.75 : 19,405.98 = 4,173.53 : x
  2. Step 2: Convert to fraction form
    12,939.75/19,405.98 = 4,173.53/x
  3. Step 3: Cross multiply
    12,939.75x = 19,405.98 × 4,173.53
  4. Step 4: Simplify right side
    12,939.75x = 80,991,342.68
  5. Step 5: Solve for x
    x = 80,991,342.68/12,939.75
  6. Step 6: Final answer
    x = 6,259.11

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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.