Home / 5,412.65-8,120.03-2,125.53

Finding the Fourth Proportional to 5,412.65, 8,120.03 and 2,125.53

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Solution

The fourth proportional to 5,412.65, 8,120.03 and 2,125.53 is: 3,188.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,412.65 : 8,120.03 = 2,125.53 : x
  2. Step 2: Convert to fraction form
    5,412.65/8,120.03 = 2,125.53/x
  3. Step 3: Cross multiply
    5,412.65x = 8,120.03 × 2,125.53
  4. Step 4: Simplify right side
    5,412.65x = 17,259,356.74
  5. Step 5: Solve for x
    x = 17,259,356.74/5,412.65
  6. Step 6: Final answer
    x = 3,188.71

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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.