Home / 7,121.16-9,829.08-4,137.96

Finding the Fourth Proportional to 7,121.16, 9,829.08 and 4,137.96

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Solution

The fourth proportional to 7,121.16, 9,829.08 and 4,137.96 is: 5,711.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.16 : 9,829.08 = 4,137.96 : x
  2. Step 2: Convert to fraction form
    7,121.16/9,829.08 = 4,137.96/x
  3. Step 3: Cross multiply
    7,121.16x = 9,829.08 × 4,137.96
  4. Step 4: Simplify right side
    7,121.16x = 40,672,339.88
  5. Step 5: Solve for x
    x = 40,672,339.88/7,121.16
  6. Step 6: Final answer
    x = 5,711.48

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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.