Home / 12,729.15-19,086.03-5,329.80

Finding the Fourth Proportional to 12,729.15, 19,086.03 and 5,329.80

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Solution

The fourth proportional to 12,729.15, 19,086.03 and 5,329.80 is: 7,991.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,729.15 : 19,086.03 = 5,329.80 : x
  2. Step 2: Convert to fraction form
    12,729.15/19,086.03 = 5,329.80/x
  3. Step 3: Cross multiply
    12,729.15x = 19,086.03 × 5,329.80
  4. Step 4: Simplify right side
    12,729.15x = 101,724,722.69
  5. Step 5: Solve for x
    x = 101,724,722.69/12,729.15
  6. Step 6: Final answer
    x = 7,991.48

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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.