Home / 3,941.19-5,438.91-2,172.78

Finding the Fourth Proportional to 3,941.19, 5,438.91 and 2,172.78

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Solution

The fourth proportional to 3,941.19, 5,438.91 and 2,172.78 is: 2,998.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,941.19 : 5,438.91 = 2,172.78 : x
  2. Step 2: Convert to fraction form
    3,941.19/5,438.91 = 2,172.78/x
  3. Step 3: Cross multiply
    3,941.19x = 5,438.91 × 2,172.78
  4. Step 4: Simplify right side
    3,941.19x = 11,817,554.87
  5. Step 5: Solve for x
    x = 11,817,554.87/3,941.19
  6. Step 6: Final answer
    x = 2,998.47

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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.