Home / 5,145.64-7,101.01-2,787.78

Finding the Fourth Proportional to 5,145.64, 7,101.01 and 2,787.78

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Solution

The fourth proportional to 5,145.64, 7,101.01 and 2,787.78 is: 3,847.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.64 : 7,101.01 = 2,787.78 : x
  2. Step 2: Convert to fraction form
    5,145.64/7,101.01 = 2,787.78/x
  3. Step 3: Cross multiply
    5,145.64x = 7,101.01 × 2,787.78
  4. Step 4: Simplify right side
    5,145.64x = 19,796,047.87
  5. Step 5: Solve for x
    x = 19,796,047.87/5,145.64
  6. Step 6: Final answer
    x = 3,847.15

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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.