Home / 3,249.77-4,485.31-2,128.73

Finding the Fourth Proportional to 3,249.77, 4,485.31 and 2,128.73

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Solution

The fourth proportional to 3,249.77, 4,485.31 and 2,128.73 is: 2,938.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,249.77 : 4,485.31 = 2,128.73 : x
  2. Step 2: Convert to fraction form
    3,249.77/4,485.31 = 2,128.73/x
  3. Step 3: Cross multiply
    3,249.77x = 4,485.31 × 2,128.73
  4. Step 4: Simplify right side
    3,249.77x = 9,547,986.21
  5. Step 5: Solve for x
    x = 9,547,986.21/3,249.77
  6. Step 6: Final answer
    x = 2,938.05

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Half scale
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Double scale
Find fourth proportional to 3,250.77, 4,486.69 and 2,129.73
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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.