Home / 13,839-20,758.29-6,439.32

Finding the Fourth Proportional to 13,839, 20,758.29 and 6,439.32

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Solution

The fourth proportional to 13,839, 20,758.29 and 6,439.32 is: 9,658.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,839 : 20,758.29 = 6,439.32 : x
  2. Step 2: Convert to fraction form
    13,839/20,758.29 = 6,439.32/x
  3. Step 3: Cross multiply
    13,839x = 20,758.29 × 6,439.32
  4. Step 4: Simplify right side
    13,839x = 133,669,271.96
  5. Step 5: Solve for x
    x = 133,669,271.96/13,839
  6. Step 6: Final answer
    x = 9,658.88

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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.