Home / 5,181.40-7,771.20-1,892.80

Finding the Fourth Proportional to 5,181.40, 7,771.20 and 1,892.80

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Solution

The fourth proportional to 5,181.40, 7,771.20 and 1,892.80 is: 2,838.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,181.40 : 7,771.20 = 1,892.80 : x
  2. Step 2: Convert to fraction form
    5,181.40/7,771.20 = 1,892.80/x
  3. Step 3: Cross multiply
    5,181.40x = 7,771.20 × 1,892.80
  4. Step 4: Simplify right side
    5,181.40x = 14,709,327.36
  5. Step 5: Solve for x
    x = 14,709,327.36/5,181.40
  6. Step 6: Final answer
    x = 2,838.87

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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.