Home / 7,138.20-10,710.35-2,979.13

Finding the Fourth Proportional to 7,138.20, 10,710.35 and 2,979.13

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Solution

The fourth proportional to 7,138.20, 10,710.35 and 2,979.13 is: 4,469.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,138.20 : 10,710.35 = 2,979.13 : x
  2. Step 2: Convert to fraction form
    7,138.20/10,710.35 = 2,979.13/x
  3. Step 3: Cross multiply
    7,138.20x = 10,710.35 × 2,979.13
  4. Step 4: Simplify right side
    7,138.20x = 31,907,522.96
  5. Step 5: Solve for x
    x = 31,907,522.96/7,138.20
  6. Step 6: Final answer
    x = 4,469.97

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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.