Home / 3,823.78-5,279.56-2,642.80

Finding the Fourth Proportional to 3,823.78, 5,279.56 and 2,642.80

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Solution

The fourth proportional to 3,823.78, 5,279.56 and 2,642.80 is: 3,648.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,823.78 : 5,279.56 = 2,642.80 : x
  2. Step 2: Convert to fraction form
    3,823.78/5,279.56 = 2,642.80/x
  3. Step 3: Cross multiply
    3,823.78x = 5,279.56 × 2,642.80
  4. Step 4: Simplify right side
    3,823.78x = 13,952,821.17
  5. Step 5: Solve for x
    x = 13,952,821.17/3,823.78
  6. Step 6: Final answer
    x = 3,648.96

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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.