Home / 5,424.25-8,136.74-2,139.65

Finding the Fourth Proportional to 5,424.25, 8,136.74 and 2,139.65

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Solution

The fourth proportional to 5,424.25, 8,136.74 and 2,139.65 is: 3,209.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,424.25 : 8,136.74 = 2,139.65 : x
  2. Step 2: Convert to fraction form
    5,424.25/8,136.74 = 2,139.65/x
  3. Step 3: Cross multiply
    5,424.25x = 8,136.74 × 2,139.65
  4. Step 4: Simplify right side
    5,424.25x = 17,409,802.24
  5. Step 5: Solve for x
    x = 17,409,802.24/5,424.25
  6. Step 6: Final answer
    x = 3,209.62

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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.