Home / 5,181.76-7,777.20-2,718.34

Finding the Fourth Proportional to 5,181.76, 7,777.20 and 2,718.34

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Solution

The fourth proportional to 5,181.76, 7,777.20 and 2,718.34 is: 4,079.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,181.76 : 7,777.20 = 2,718.34 : x
  2. Step 2: Convert to fraction form
    5,181.76/7,777.20 = 2,718.34/x
  3. Step 3: Cross multiply
    5,181.76x = 7,777.20 × 2,718.34
  4. Step 4: Simplify right side
    5,181.76x = 21,141,073.85
  5. Step 5: Solve for x
    x = 21,141,073.85/5,181.76
  6. Step 6: Final answer
    x = 4,079.90

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1.5x scale

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.