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Finding the Fourth Proportional to 5,015.76, 6,921.99 and 2,777.88

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Solution

The fourth proportional to 5,015.76, 6,921.99 and 2,777.88 is: 3,833.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,015.76 : 6,921.99 = 2,777.88 : x
  2. Step 2: Convert to fraction form
    5,015.76/6,921.99 = 2,777.88/x
  3. Step 3: Cross multiply
    5,015.76x = 6,921.99 × 2,777.88
  4. Step 4: Simplify right side
    5,015.76x = 19,228,457.58
  5. Step 5: Solve for x
    x = 19,228,457.58/5,015.76
  6. Step 6: Final answer
    x = 3,833.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.