Home / 8,679.69-13,021.74-2,439.77

Finding the Fourth Proportional to 8,679.69, 13,021.74 and 2,439.77

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Solution

The fourth proportional to 8,679.69, 13,021.74 and 2,439.77 is: 3,660.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.69 : 13,021.74 = 2,439.77 : x
  2. Step 2: Convert to fraction form
    8,679.69/13,021.74 = 2,439.77/x
  3. Step 3: Cross multiply
    8,679.69x = 13,021.74 × 2,439.77
  4. Step 4: Simplify right side
    8,679.69x = 31,769,985.49
  5. Step 5: Solve for x
    x = 31,769,985.49/8,679.69
  6. Step 6: Final answer
    x = 3,660.27

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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.