Home / 5,218.50-7,202.14-2,980.70

Finding the Fourth Proportional to 5,218.50, 7,202.14 and 2,980.70

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Solution

The fourth proportional to 5,218.50, 7,202.14 and 2,980.70 is: 4,113.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,218.50 : 7,202.14 = 2,980.70 : x
  2. Step 2: Convert to fraction form
    5,218.50/7,202.14 = 2,980.70/x
  3. Step 3: Cross multiply
    5,218.50x = 7,202.14 × 2,980.70
  4. Step 4: Simplify right side
    5,218.50x = 21,467,418.70
  5. Step 5: Solve for x
    x = 21,467,418.70/5,218.50
  6. Step 6: Final answer
    x = 4,113.71

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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.