Home / 3,927.40-5,419.90-2,159.16

Finding the Fourth Proportional to 3,927.40, 5,419.90 and 2,159.16

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Solution

The fourth proportional to 3,927.40, 5,419.90 and 2,159.16 is: 2,979.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,927.40 : 5,419.90 = 2,159.16 : x
  2. Step 2: Convert to fraction form
    3,927.40/5,419.90 = 2,159.16/x
  3. Step 3: Cross multiply
    3,927.40x = 5,419.90 × 2,159.16
  4. Step 4: Simplify right side
    3,927.40x = 11,702,431.28
  5. Step 5: Solve for x
    x = 11,702,431.28/3,927.40
  6. Step 6: Final answer
    x = 2,979.69

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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.