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Finding the Fourth Proportional to 6,810.87, 10,211.10 and 3,521.86

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Solution

The fourth proportional to 6,810.87, 10,211.10 and 3,521.86 is: 5,280.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,810.87 : 10,211.10 = 3,521.86 : x
  2. Step 2: Convert to fraction form
    6,810.87/10,211.10 = 3,521.86/x
  3. Step 3: Cross multiply
    6,810.87x = 10,211.10 × 3,521.86
  4. Step 4: Simplify right side
    6,810.87x = 35,962,064.65
  5. Step 5: Solve for x
    x = 35,962,064.65/6,810.87
  6. Step 6: Final answer
    x = 5,280.10

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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.