Home / 5,479.78-7,562.16-3,121.90

Finding the Fourth Proportional to 5,479.78, 7,562.16 and 3,121.90

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Solution

The fourth proportional to 5,479.78, 7,562.16 and 3,121.90 is: 4,308.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,479.78 : 7,562.16 = 3,121.90 : x
  2. Step 2: Convert to fraction form
    5,479.78/7,562.16 = 3,121.90/x
  3. Step 3: Cross multiply
    5,479.78x = 7,562.16 × 3,121.90
  4. Step 4: Simplify right side
    5,479.78x = 23,608,307.30
  5. Step 5: Solve for x
    x = 23,608,307.30/5,479.78
  6. Step 6: Final answer
    x = 4,308.26

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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.