Home / 13,790.94-20,687.63-3,930

Finding the Fourth Proportional to 13,790.94, 20,687.63 and 3,930

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Solution

The fourth proportional to 13,790.94, 20,687.63 and 3,930 is: 5,895.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,790.94 : 20,687.63 = 3,930 : x
  2. Step 2: Convert to fraction form
    13,790.94/20,687.63 = 3,930/x
  3. Step 3: Cross multiply
    13,790.94x = 20,687.63 × 3,930
  4. Step 4: Simplify right side
    13,790.94x = 81,302,366.25
  5. Step 5: Solve for x
    x = 81,302,366.25/13,790.94
  6. Step 6: Final answer
    x = 5,895.35

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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.