Home / 3,681.09-5,079.92-2,109.20

Finding the Fourth Proportional to 3,681.09, 5,079.92 and 2,109.20

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Solution

The fourth proportional to 3,681.09, 5,079.92 and 2,109.20 is: 2,910.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,681.09 : 5,079.92 = 2,109.20 : x
  2. Step 2: Convert to fraction form
    3,681.09/5,079.92 = 2,109.20/x
  3. Step 3: Cross multiply
    3,681.09x = 5,079.92 × 2,109.20
  4. Step 4: Simplify right side
    3,681.09x = 10,714,567.26
  5. Step 5: Solve for x
    x = 10,714,567.26/3,681.09
  6. Step 6: Final answer
    x = 2,910.71

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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.