Home / 4,721.36-7,086.28-2,638.32

Finding the Fourth Proportional to 4,721.36, 7,086.28 and 2,638.32

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Solution

The fourth proportional to 4,721.36, 7,086.28 and 2,638.32 is: 3,959.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,721.36 : 7,086.28 = 2,638.32 : x
  2. Step 2: Convert to fraction form
    4,721.36/7,086.28 = 2,638.32/x
  3. Step 3: Cross multiply
    4,721.36x = 7,086.28 × 2,638.32
  4. Step 4: Simplify right side
    4,721.36x = 18,695,874.25
  5. Step 5: Solve for x
    x = 18,695,874.25/4,721.36
  6. Step 6: Final answer
    x = 3,959.85

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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.