Home / 3,431.80-5,148.32-2,620.16

Finding the Fourth Proportional to 3,431.80, 5,148.32 and 2,620.16

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Solution

The fourth proportional to 3,431.80, 5,148.32 and 2,620.16 is: 3,930.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.80 : 5,148.32 = 2,620.16 : x
  2. Step 2: Convert to fraction form
    3,431.80/5,148.32 = 2,620.16/x
  3. Step 3: Cross multiply
    3,431.80x = 5,148.32 × 2,620.16
  4. Step 4: Simplify right side
    3,431.80x = 13,489,422.13
  5. Step 5: Solve for x
    x = 13,489,422.13/3,431.80
  6. Step 6: Final answer
    x = 3,930.71

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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.