Home / 3,180.89-4,388.01-2,131.13

Finding the Fourth Proportional to 3,180.89, 4,388.01 and 2,131.13

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Solution

The fourth proportional to 3,180.89, 4,388.01 and 2,131.13 is: 2,939.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,180.89 : 4,388.01 = 2,131.13 : x
  2. Step 2: Convert to fraction form
    3,180.89/4,388.01 = 2,131.13/x
  3. Step 3: Cross multiply
    3,180.89x = 4,388.01 × 2,131.13
  4. Step 4: Simplify right side
    3,180.89x = 9,351,397.81
  5. Step 5: Solve for x
    x = 9,351,397.81/3,180.89
  6. Step 6: Final answer
    x = 2,939.87

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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.