Home / 5,145.85-7,101.23-2,787.98

Finding the Fourth Proportional to 5,145.85, 7,101.23 and 2,787.98

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Solution

The fourth proportional to 5,145.85, 7,101.23 and 2,787.98 is: 3,847.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.85 : 7,101.23 = 2,787.98 : x
  2. Step 2: Convert to fraction form
    5,145.85/7,101.23 = 2,787.98/x
  3. Step 3: Cross multiply
    5,145.85x = 7,101.23 × 2,787.98
  4. Step 4: Simplify right side
    5,145.85x = 19,798,091.03
  5. Step 5: Solve for x
    x = 19,798,091.03/5,145.85
  6. Step 6: Final answer
    x = 3,847.39

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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.