Home / 7,765.20-11,647.90-2,218.54

Finding the Fourth Proportional to 7,765.20, 11,647.90 and 2,218.54

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Solution

The fourth proportional to 7,765.20, 11,647.90 and 2,218.54 is: 3,327.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,765.20 : 11,647.90 = 2,218.54 : x
  2. Step 2: Convert to fraction form
    7,765.20/11,647.90 = 2,218.54/x
  3. Step 3: Cross multiply
    7,765.20x = 11,647.90 × 2,218.54
  4. Step 4: Simplify right side
    7,765.20x = 25,841,332.07
  5. Step 5: Solve for x
    x = 25,841,332.07/7,765.20
  6. Step 6: Final answer
    x = 3,327.84

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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.