Home / 3,941.09-5,438.63-2,172.86

Finding the Fourth Proportional to 3,941.09, 5,438.63 and 2,172.86

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Solution

The fourth proportional to 3,941.09, 5,438.63 and 2,172.86 is: 2,998.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,941.09 : 5,438.63 = 2,172.86 : x
  2. Step 2: Convert to fraction form
    3,941.09/5,438.63 = 2,172.86/x
  3. Step 3: Cross multiply
    3,941.09x = 5,438.63 × 2,172.86
  4. Step 4: Simplify right side
    3,941.09x = 11,817,381.58
  5. Step 5: Solve for x
    x = 11,817,381.58/3,941.09
  6. Step 6: Final answer
    x = 2,998.51

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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.