Home / 3,427.12-5,139.60-1,782.78

Finding the Fourth Proportional to 3,427.12, 5,139.60 and 1,782.78

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Solution

The fourth proportional to 3,427.12, 5,139.60 and 1,782.78 is: 2,673.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,427.12 : 5,139.60 = 1,782.78 : x
  2. Step 2: Convert to fraction form
    3,427.12/5,139.60 = 1,782.78/x
  3. Step 3: Cross multiply
    3,427.12x = 5,139.60 × 1,782.78
  4. Step 4: Simplify right side
    3,427.12x = 9,162,776.09
  5. Step 5: Solve for x
    x = 9,162,776.09/3,427.12
  6. Step 6: Final answer
    x = 2,673.61

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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.