Home / 5,211.05-7,815.62-1,513.80

Finding the Fourth Proportional to 5,211.05, 7,815.62 and 1,513.80

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Solution

The fourth proportional to 5,211.05, 7,815.62 and 1,513.80 is: 2,270.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,211.05 : 7,815.62 = 1,513.80 : x
  2. Step 2: Convert to fraction form
    5,211.05/7,815.62 = 1,513.80/x
  3. Step 3: Cross multiply
    5,211.05x = 7,815.62 × 1,513.80
  4. Step 4: Simplify right side
    5,211.05x = 11,831,289.34
  5. Step 5: Solve for x
    x = 11,831,289.34/5,211.05
  6. Step 6: Final answer
    x = 2,270.43

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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.