Home / 5,422.16-8,120.24-2,782.72

Finding the Fourth Proportional to 5,422.16, 8,120.24 and 2,782.72

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Solution

The fourth proportional to 5,422.16, 8,120.24 and 2,782.72 is: 4,167.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,422.16 : 8,120.24 = 2,782.72 : x
  2. Step 2: Convert to fraction form
    5,422.16/8,120.24 = 2,782.72/x
  3. Step 3: Cross multiply
    5,422.16x = 8,120.24 × 2,782.72
  4. Step 4: Simplify right side
    5,422.16x = 22,596,354.25
  5. Step 5: Solve for x
    x = 22,596,354.25/5,422.16
  6. Step 6: Final answer
    x = 4,167.41

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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.