Home / 5,115.65-7,677.66-2,651.21

Finding the Fourth Proportional to 5,115.65, 7,677.66 and 2,651.21

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Solution

The fourth proportional to 5,115.65, 7,677.66 and 2,651.21 is: 3,978.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.65 : 7,677.66 = 2,651.21 : x
  2. Step 2: Convert to fraction form
    5,115.65/7,677.66 = 2,651.21/x
  3. Step 3: Cross multiply
    5,115.65x = 7,677.66 × 2,651.21
  4. Step 4: Simplify right side
    5,115.65x = 20,355,088.97
  5. Step 5: Solve for x
    x = 20,355,088.97/5,115.65
  6. Step 6: Final answer
    x = 3,978.98

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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.