Home / 5,286.31-7,929.47-2,165.75

Finding the Fourth Proportional to 5,286.31, 7,929.47 and 2,165.75

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Solution

The fourth proportional to 5,286.31, 7,929.47 and 2,165.75 is: 3,248.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,286.31 : 7,929.47 = 2,165.75 : x
  2. Step 2: Convert to fraction form
    5,286.31/7,929.47 = 2,165.75/x
  3. Step 3: Cross multiply
    5,286.31x = 7,929.47 × 2,165.75
  4. Step 4: Simplify right side
    5,286.31x = 17,173,245.16
  5. Step 5: Solve for x
    x = 17,173,245.16/5,286.31
  6. Step 6: Final answer
    x = 3,248.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.