Home / 5,081.36-7,622.20-1,621.20

Finding the Fourth Proportional to 5,081.36, 7,622.20 and 1,621.20

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Solution

The fourth proportional to 5,081.36, 7,622.20 and 1,621.20 is: 2,431.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,081.36 : 7,622.20 = 1,621.20 : x
  2. Step 2: Convert to fraction form
    5,081.36/7,622.20 = 1,621.20/x
  3. Step 3: Cross multiply
    5,081.36x = 7,622.20 × 1,621.20
  4. Step 4: Simplify right side
    5,081.36x = 12,357,110.64
  5. Step 5: Solve for x
    x = 12,357,110.64/5,081.36
  6. Step 6: Final answer
    x = 2,431.85

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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.