Home / 6,623.10-9,139.86-3,639

Finding the Fourth Proportional to 6,623.10, 9,139.86 and 3,639

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Solution

The fourth proportional to 6,623.10, 9,139.86 and 3,639 is: 5,021.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,623.10 : 9,139.86 = 3,639 : x
  2. Step 2: Convert to fraction form
    6,623.10/9,139.86 = 3,639/x
  3. Step 3: Cross multiply
    6,623.10x = 9,139.86 × 3,639
  4. Step 4: Simplify right side
    6,623.10x = 33,259,950.54
  5. Step 5: Solve for x
    x = 33,259,950.54/6,623.10
  6. Step 6: Final answer
    x = 5,021.81

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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.