Home / 5,619-8,429.85-2,156.25

Finding the Fourth Proportional to 5,619, 8,429.85 and 2,156.25

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Solution

The fourth proportional to 5,619, 8,429.85 and 2,156.25 is: 3,234.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,619 : 8,429.85 = 2,156.25 : x
  2. Step 2: Convert to fraction form
    5,619/8,429.85 = 2,156.25/x
  3. Step 3: Cross multiply
    5,619x = 8,429.85 × 2,156.25
  4. Step 4: Simplify right side
    5,619x = 18,176,864.06
  5. Step 5: Solve for x
    x = 18,176,864.06/5,619
  6. Step 6: Final answer
    x = 3,234.89

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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.