Home / 12,931.25-19,398-3,571.28

Finding the Fourth Proportional to 12,931.25, 19,398 and 3,571.28

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Solution

The fourth proportional to 12,931.25, 19,398 and 3,571.28 is: 5,357.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,931.25 : 19,398 = 3,571.28 : x
  2. Step 2: Convert to fraction form
    12,931.25/19,398 = 3,571.28/x
  3. Step 3: Cross multiply
    12,931.25x = 19,398 × 3,571.28
  4. Step 4: Simplify right side
    12,931.25x = 69,275,689.44
  5. Step 5: Solve for x
    x = 69,275,689.44/12,931.25
  6. Step 6: Final answer
    x = 5,357.23

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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.