Home / 3,834.82-5,291.79-2,156.40

Finding the Fourth Proportional to 3,834.82, 5,291.79 and 2,156.40

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Solution

The fourth proportional to 3,834.82, 5,291.79 and 2,156.40 is: 2,975.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,834.82 : 5,291.79 = 2,156.40 : x
  2. Step 2: Convert to fraction form
    3,834.82/5,291.79 = 2,156.40/x
  3. Step 3: Cross multiply
    3,834.82x = 5,291.79 × 2,156.40
  4. Step 4: Simplify right side
    3,834.82x = 11,411,215.96
  5. Step 5: Solve for x
    x = 11,411,215.96/3,834.82
  6. Step 6: Final answer
    x = 2,975.68

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1.5x scale

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.