Home / 5,210.21-7,815.92-2,091.30

Finding the Fourth Proportional to 5,210.21, 7,815.92 and 2,091.30

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Solution

The fourth proportional to 5,210.21, 7,815.92 and 2,091.30 is: 3,137.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,210.21 : 7,815.92 = 2,091.30 : x
  2. Step 2: Convert to fraction form
    5,210.21/7,815.92 = 2,091.30/x
  3. Step 3: Cross multiply
    5,210.21x = 7,815.92 × 2,091.30
  4. Step 4: Simplify right side
    5,210.21x = 16,345,433.50
  5. Step 5: Solve for x
    x = 16,345,433.50/5,210.21
  6. Step 6: Final answer
    x = 3,137.19

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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.