Home / 3,130.82-4,321.61-1,805.04

Finding the Fourth Proportional to 3,130.82, 4,321.61 and 1,805.04

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Solution

The fourth proportional to 3,130.82, 4,321.61 and 1,805.04 is: 2,491.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.82 : 4,321.61 = 1,805.04 : x
  2. Step 2: Convert to fraction form
    3,130.82/4,321.61 = 1,805.04/x
  3. Step 3: Cross multiply
    3,130.82x = 4,321.61 × 1,805.04
  4. Step 4: Simplify right side
    3,130.82x = 7,800,669.89
  5. Step 5: Solve for x
    x = 7,800,669.89/3,130.82
  6. Step 6: Final answer
    x = 2,491.58

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Double scale
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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.