Home / 5,251.25-7,869.78-2,911.16

Finding the Fourth Proportional to 5,251.25, 7,869.78 and 2,911.16

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Solution

The fourth proportional to 5,251.25, 7,869.78 and 2,911.16 is: 4,362.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,251.25 : 7,869.78 = 2,911.16 : x
  2. Step 2: Convert to fraction form
    5,251.25/7,869.78 = 2,911.16/x
  3. Step 3: Cross multiply
    5,251.25x = 7,869.78 × 2,911.16
  4. Step 4: Simplify right side
    5,251.25x = 22,910,149.40
  5. Step 5: Solve for x
    x = 22,910,149.40/5,251.25
  6. Step 6: Final answer
    x = 4,362.80

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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.