Home / 3,719-5,131.86-2,147.16

Finding the Fourth Proportional to 3,719, 5,131.86 and 2,147.16

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Solution

The fourth proportional to 3,719, 5,131.86 and 2,147.16 is: 2,962.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,719 : 5,131.86 = 2,147.16 : x
  2. Step 2: Convert to fraction form
    3,719/5,131.86 = 2,147.16/x
  3. Step 3: Cross multiply
    3,719x = 5,131.86 × 2,147.16
  4. Step 4: Simplify right side
    3,719x = 11,018,924.52
  5. Step 5: Solve for x
    x = 11,018,924.52/3,719
  6. Step 6: Final answer
    x = 2,962.87

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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.