Home / 3,689.28-5,090.83-2,176.80

Finding the Fourth Proportional to 3,689.28, 5,090.83 and 2,176.80

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Solution

The fourth proportional to 3,689.28, 5,090.83 and 2,176.80 is: 3,003.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,689.28 : 5,090.83 = 2,176.80 : x
  2. Step 2: Convert to fraction form
    3,689.28/5,090.83 = 2,176.80/x
  3. Step 3: Cross multiply
    3,689.28x = 5,090.83 × 2,176.80
  4. Step 4: Simplify right side
    3,689.28x = 11,081,718.74
  5. Step 5: Solve for x
    x = 11,081,718.74/3,689.28
  6. Step 6: Final answer
    x = 3,003.76

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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.