Home / 3,723.78-5,139.48-2,784.28

Finding the Fourth Proportional to 3,723.78, 5,139.48 and 2,784.28

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Solution

The fourth proportional to 3,723.78, 5,139.48 and 2,784.28 is: 3,842.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,723.78 : 5,139.48 = 2,784.28 : x
  2. Step 2: Convert to fraction form
    3,723.78/5,139.48 = 2,784.28/x
  3. Step 3: Cross multiply
    3,723.78x = 5,139.48 × 2,784.28
  4. Step 4: Simplify right side
    3,723.78x = 14,309,751.37
  5. Step 5: Solve for x
    x = 14,309,751.37/3,723.78
  6. Step 6: Final answer
    x = 3,842.80

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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.