Home / 5,279-7,919.85-1,816.34

Finding the Fourth Proportional to 5,279, 7,919.85 and 1,816.34

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Solution

The fourth proportional to 5,279, 7,919.85 and 1,816.34 is: 2,724.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,279 : 7,919.85 = 1,816.34 : x
  2. Step 2: Convert to fraction form
    5,279/7,919.85 = 1,816.34/x
  3. Step 3: Cross multiply
    5,279x = 7,919.85 × 1,816.34
  4. Step 4: Simplify right side
    5,279x = 14,385,140.35
  5. Step 5: Solve for x
    x = 14,385,140.35/5,279
  6. Step 6: Final answer
    x = 2,724.97

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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.