Home / 5,145.70-7,101.05-2,787.85

Finding the Fourth Proportional to 5,145.70, 7,101.05 and 2,787.85

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Solution

The fourth proportional to 5,145.70, 7,101.05 and 2,787.85 is: 3,847.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.70 : 7,101.05 = 2,787.85 : x
  2. Step 2: Convert to fraction form
    5,145.70/7,101.05 = 2,787.85/x
  3. Step 3: Cross multiply
    5,145.70x = 7,101.05 × 2,787.85
  4. Step 4: Simplify right side
    5,145.70x = 19,796,662.24
  5. Step 5: Solve for x
    x = 19,796,662.24/5,145.70
  6. Step 6: Final answer
    x = 3,847.22

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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.