Home / 3,941.40-5,439-2,172.92

Finding the Fourth Proportional to 3,941.40, 5,439 and 2,172.92

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Solution

The fourth proportional to 3,941.40, 5,439 and 2,172.92 is: 2,998.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,941.40 : 5,439 = 2,172.92 : x
  2. Step 2: Convert to fraction form
    3,941.40/5,439 = 2,172.92/x
  3. Step 3: Cross multiply
    3,941.40x = 5,439 × 2,172.92
  4. Step 4: Simplify right side
    3,941.40x = 11,818,511.88
  5. Step 5: Solve for x
    x = 11,818,511.88/3,941.40
  6. Step 6: Final answer
    x = 2,998.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.