Home / 3,918.79-5,868.87-2,161.09

Finding the Fourth Proportional to 3,918.79, 5,868.87 and 2,161.09

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Solution

The fourth proportional to 3,918.79, 5,868.87 and 2,161.09 is: 3,236.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.79 : 5,868.87 = 2,161.09 : x
  2. Step 2: Convert to fraction form
    3,918.79/5,868.87 = 2,161.09/x
  3. Step 3: Cross multiply
    3,918.79x = 5,868.87 × 2,161.09
  4. Step 4: Simplify right side
    3,918.79x = 12,683,156.27
  5. Step 5: Solve for x
    x = 12,683,156.27/3,918.79
  6. Step 6: Final answer
    x = 3,236.50

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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.