Home / 5,145.74-7,101.13-2,787.89

Finding the Fourth Proportional to 5,145.74, 7,101.13 and 2,787.89

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Solution

The fourth proportional to 5,145.74, 7,101.13 and 2,787.89 is: 3,847.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.74 : 7,101.13 = 2,787.89 : x
  2. Step 2: Convert to fraction form
    5,145.74/7,101.13 = 2,787.89/x
  3. Step 3: Cross multiply
    5,145.74x = 7,101.13 × 2,787.89
  4. Step 4: Simplify right side
    5,145.74x = 19,797,119.87
  5. Step 5: Solve for x
    x = 19,797,119.87/5,145.74
  6. Step 6: Final answer
    x = 3,847.28

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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.