Home / 12,931.31-19,396.97-3,571.43

Finding the Fourth Proportional to 12,931.31, 19,396.97 and 3,571.43

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Solution

The fourth proportional to 12,931.31, 19,396.97 and 3,571.43 is: 5,357.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,931.31 : 19,396.97 = 3,571.43 : x
  2. Step 2: Convert to fraction form
    12,931.31/19,396.97 = 3,571.43/x
  3. Step 3: Cross multiply
    12,931.31x = 19,396.97 × 3,571.43
  4. Step 4: Simplify right side
    12,931.31x = 69,274,819.12
  5. Step 5: Solve for x
    x = 69,274,819.12/12,931.31
  6. Step 6: Final answer
    x = 5,357.14

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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.