Home / 5,142.40-7,716.35-2,181.30

Finding the Fourth Proportional to 5,142.40, 7,716.35 and 2,181.30

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Solution

The fourth proportional to 5,142.40, 7,716.35 and 2,181.30 is: 3,273.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,142.40 : 7,716.35 = 2,181.30 : x
  2. Step 2: Convert to fraction form
    5,142.40/7,716.35 = 2,181.30/x
  3. Step 3: Cross multiply
    5,142.40x = 7,716.35 × 2,181.30
  4. Step 4: Simplify right side
    5,142.40x = 16,831,638.50
  5. Step 5: Solve for x
    x = 16,831,638.50/5,142.40
  6. Step 6: Final answer
    x = 3,273.11

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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.