Home / 5,148-7,721.64-2,684.21

Finding the Fourth Proportional to 5,148, 7,721.64 and 2,684.21

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Solution

The fourth proportional to 5,148, 7,721.64 and 2,684.21 is: 4,026.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,148 : 7,721.64 = 2,684.21 : x
  2. Step 2: Convert to fraction form
    5,148/7,721.64 = 2,684.21/x
  3. Step 3: Cross multiply
    5,148x = 7,721.64 × 2,684.21
  4. Step 4: Simplify right side
    5,148x = 20,726,464.70
  5. Step 5: Solve for x
    x = 20,726,464.70/5,148
  6. Step 6: Final answer
    x = 4,026.12

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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.