Home / 3,834.61-5,291.05-2,155.80

Finding the Fourth Proportional to 3,834.61, 5,291.05 and 2,155.80

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Solution

The fourth proportional to 3,834.61, 5,291.05 and 2,155.80 is: 2,974.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,834.61 : 5,291.05 = 2,155.80 : x
  2. Step 2: Convert to fraction form
    3,834.61/5,291.05 = 2,155.80/x
  3. Step 3: Cross multiply
    3,834.61x = 5,291.05 × 2,155.80
  4. Step 4: Simplify right side
    3,834.61x = 11,406,445.59
  5. Step 5: Solve for x
    x = 11,406,445.59/3,834.61
  6. Step 6: Final answer
    x = 2,974.60

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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.