Home / 5,121.85-7,685.71-2,160.08

Finding the Fourth Proportional to 5,121.85, 7,685.71 and 2,160.08

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Solution

The fourth proportional to 5,121.85, 7,685.71 and 2,160.08 is: 3,241.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.85 : 7,685.71 = 2,160.08 : x
  2. Step 2: Convert to fraction form
    5,121.85/7,685.71 = 2,160.08/x
  3. Step 3: Cross multiply
    5,121.85x = 7,685.71 × 2,160.08
  4. Step 4: Simplify right side
    5,121.85x = 16,601,748.46
  5. Step 5: Solve for x
    x = 16,601,748.46/5,121.85
  6. Step 6: Final answer
    x = 3,241.36

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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.