Home / 12,931.75-19,398.75-3,571.78

Finding the Fourth Proportional to 12,931.75, 19,398.75 and 3,571.78

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Solution

The fourth proportional to 12,931.75, 19,398.75 and 3,571.78 is: 5,357.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,931.75 : 19,398.75 = 3,571.78 : x
  2. Step 2: Convert to fraction form
    12,931.75/19,398.75 = 3,571.78/x
  3. Step 3: Cross multiply
    12,931.75x = 19,398.75 × 3,571.78
  4. Step 4: Simplify right side
    12,931.75x = 69,288,067.28
  5. Step 5: Solve for x
    x = 69,288,067.28/12,931.75
  6. Step 6: Final answer
    x = 5,357.98

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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.