Home / 5,121.81-7,685.70-2,160.07

Finding the Fourth Proportional to 5,121.81, 7,685.70 and 2,160.07

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Solution

The fourth proportional to 5,121.81, 7,685.70 and 2,160.07 is: 3,241.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.81 : 7,685.70 = 2,160.07 : x
  2. Step 2: Convert to fraction form
    5,121.81/7,685.70 = 2,160.07/x
  3. Step 3: Cross multiply
    5,121.81x = 7,685.70 × 2,160.07
  4. Step 4: Simplify right side
    5,121.81x = 16,601,622.68
  5. Step 5: Solve for x
    x = 16,601,622.68/5,121.81
  6. Step 6: Final answer
    x = 3,241.36

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1.5x scale

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.