Home / 8,759.69-13,139.62-2,185.79

Finding the Fourth Proportional to 8,759.69, 13,139.62 and 2,185.79

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Solution

The fourth proportional to 8,759.69, 13,139.62 and 2,185.79 is: 3,278.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,759.69 : 13,139.62 = 2,185.79 : x
  2. Step 2: Convert to fraction form
    8,759.69/13,139.62 = 2,185.79/x
  3. Step 3: Cross multiply
    8,759.69x = 13,139.62 × 2,185.79
  4. Step 4: Simplify right side
    8,759.69x = 28,720,378.84
  5. Step 5: Solve for x
    x = 28,720,378.84/8,759.69
  6. Step 6: Final answer
    x = 3,278.70

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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.