Home / 3,876.90-5,814.32-1,685.11

Finding the Fourth Proportional to 3,876.90, 5,814.32 and 1,685.11

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Solution

The fourth proportional to 3,876.90, 5,814.32 and 1,685.11 is: 2,527.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,876.90 : 5,814.32 = 1,685.11 : x
  2. Step 2: Convert to fraction form
    3,876.90/5,814.32 = 1,685.11/x
  3. Step 3: Cross multiply
    3,876.90x = 5,814.32 × 1,685.11
  4. Step 4: Simplify right side
    3,876.90x = 9,797,745.81
  5. Step 5: Solve for x
    x = 9,797,745.81/3,876.90
  6. Step 6: Final answer
    x = 2,527.21

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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.