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Finding the Fourth Proportional to 5,015.78, 6,921.83 and 2,777.78

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Solution

The fourth proportional to 5,015.78, 6,921.83 and 2,777.78 is: 3,833.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,015.78 : 6,921.83 = 2,777.78 : x
  2. Step 2: Convert to fraction form
    5,015.78/6,921.83 = 2,777.78/x
  3. Step 3: Cross multiply
    5,015.78x = 6,921.83 × 2,777.78
  4. Step 4: Simplify right side
    5,015.78x = 19,227,320.94
  5. Step 5: Solve for x
    x = 19,227,320.94/5,015.78
  6. Step 6: Final answer
    x = 3,833.37

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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.